Perhaps you should try some spelling variations:
pho gian » pho giao, thoi gian, cho giang
gian van » giang van, gian dan, gian lan
dieu tra » kiem tra
sach han » sach tham, sach danh, sach nang
sach lan » sach luan, sach san, sach danh
qua dieu » cua dieu, qua tieu, quan dien
phoi cay » nuoi cay, phoi tai, cho cay
tiep cua » tiep can, tap cua, tiep va
cua tiep » cua thep, cua tiem, cua triet
tien thu » tieu thu, kien thuc, trien thi
van tien » toan tien, van hieu, van tuan
cay qua » cau qua, cac qua, cay lua
cap cua » cap cuu, ca cua, tap cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( pho gian van tien thu ) or ((((( pho cap cua tiep cua ) or ( phoi cay qua dieu cua ))) or ((( pho ((sach lan) or (sach han)) dieu cua ) or ( pho ((sach lan) or (sach han)) ((dieu tra) OR (dieu tri)) ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( pho gian van tien thu ) OR ((((( pho cap cua tiep cua ) OR ( phoi cay qua dieu cua ))) OR ((( pho ((sach lan) OR (sach han)) dieu cua ) OR ( pho ((sach lan) OR (sach han)) ((dieu tra) OR (dieu tri)) ))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( pho gian van tien thu ) or ((((( pho cap cua tiep cua ) or ( phoi cay qua dieu cua ))) or ((( pho ((sach lan) or (sach han)) dieu cua ) or ( pho ((sach lan) or (sach han)) ((dieu tra) OR (dieu tri)) ))))))*".