Perhaps you should try some spelling variations:
thien van » thi van
thuc day » thuc dan, thuc vat
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, lieu va, hieu ve
cau tren » cu tren, dau tren, ca tren
thuc va » thuc vat, thuc dan
hanh va » hang va, hanh vi
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach v nang x hoi. ((hieu van) or (thien van)) cham ((thuc va) OR (thuc day)) hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach v nang x hoi. ((hieu van) OR (thien van)) cham ((thuc va) OR (thuc day)) hanh va cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach v nang x hoi. ((hieu van) or (thien van)) cham ((thuc va) OR (thuc day)) hanh va cau tren*".