Perhaps you should try some spelling variations:
cua trinh » qua trinh, xuan trinh, quy trinh
trien cua » truyen cua, trien nha, tri cua
dang tien » dang thien, bang tien, dong tien
gian dang » gian dan, gian lang, gian dong
sach luan » sach luyen, sach han, san luan
cua triet » su triet, va triet
cua trien » chua trieu, cua truyen, va trien
pham sach » pham anh, nam sach, pham hanh
cua viet » ca viet, hoa viet, cua vat
pho gian » pho giao, cho giang, ho gia
cua tinh » cua sinh, va tinh, ha tinh
cua dieu » va dieu
pho sach » khoa sach, khoe sach, pho trach
hieu tra » hiep tran, chieu tro, hien trau
sach cua » mach cua, cach cua, sac cua
dieu tra » dieu tri, kiem tra
tien thu » kien thuc, trien thi, bien thuc
gian day » giang day, gian dan, gian tay
pho danh » kho danh, cho doanh, khao danh
day tieu » may tien
tieu thu » trieu thi, tieu su
cac qua » cau qua, tac quan
qua tap » qua ap, cua tap, qua tai
tap cua » tap quan, tiep cua
cam cua » ca cua, nam cua, cau cua
pho cam » pho tam, pho nam, pho cap
pha cac » phan cac, phap cac, pha cau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( pho gian dang tien thu ) OR ( thoi gian day tieu thu ))) OR ((((( pha cac qua tap cua ) OR ((( pho danh ((cua trinh) OR (cua tinh)) cua ) OR ((( pho cam ((cua triet) OR (cua viet)) cua ) OR ( pho cam cua trien cua ))))))) OR ((( pham sach cua dieu cua ) OR ( pho sach luan ((hieu tra) OR (dieu tra)) ))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( pho gian dang tien thu ) or ( thoi gian day tieu thu ))) or ((((( pha cac qua tap cua ) or ((( pho danh ((cua trinh) or (cua tinh)) cua ) or ((( pho cam ((cua triet) OR (cua viet)) cua ) or ( pho cam cua trien cua ))))))) or ((( pham sach cua dieu cua ) or ( pho sach luan ((hieu tra) or (dieu tra)) ))))))~".
• Adding a wildcard symbol may retrieve word variants: (((( pho gian dang tien thu ) or ( thoi gian day tieu thu ))) or ((((( pha cac qua tap cua ) or ((( pho danh ((cua trinh) or (cua tinh)) cua ) or ((( pho cam ((cua triet) OR (cua viet)) cua ) or ( pho cam cua trien cua ))))))) or ((( pham sach cua dieu cua ) or ( pho sach luan ((hieu tra) or (dieu tra)) ))))))*.