Perhaps you should try some spelling variations:
pham hanh » pham thanh, pham anh, pham hang
pham sach » pham anh, nam sach
pho gian » pho giao, cho giang, ho gia
lan dieu » luan dieu, han dieu, nhan dieu
dieu tra » dieu tri, kiem tra
tiep cua » tiep can, tap cua, tiep va
cua tiep » cua thep, cua tiem, cua triet
tien thu » tieu thu, kien thuc, trien thi
cac qua » cau qua, tac quan
cay qua » cau qua, cay lua, cay dua
co cua » con cua, ca cua, cong cua
pho co » pho ho, pho o, pho cu

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) or (thoi gian)) toan tien thu ) or ((((( pho co cua tiep cua ) or ( phoi ((cay qua) or (cac qua)) dieu cua ))) or ((( ((pham sach) OR (pham hanh)) lan dieu cua ) or ( ((pham sach) OR (pham hanh)) lan dieu tra ))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((pho gian) OR (thoi gian)) toan tien thu ) OR ((((( pho co cua tiep cua ) OR ( phoi ((cay qua) OR (cac qua)) dieu cua ))) OR ((( ((pham sach) OR (pham hanh)) lan dieu cua ) OR ( ((pham sach) OR (pham hanh)) lan dieu tra ))))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((pho gian) or (thoi gian)) toan tien thu ) or ((((( pho co cua tiep cua ) or ( phoi ((cay qua) or (cac qua)) dieu cua ))) or ((( ((pham sach) OR (pham hanh)) lan dieu cua ) or ( ((pham sach) OR (pham hanh)) lan dieu tra ))))))*".