Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
thuc van » thuc vat, thuc dan, thuc va
vai cua » dai cua, hai cua, lai cua
tuc van » truc van, tuc va, duc van
ve cham » va cham, ve chat, vu cham
xay hoi » xa hoi, tay hoi, cay phoi
cua tuc » cua duc, cua tu, cua thuoc
ve cam » ve cac, va cam, ve cai

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 _ dang xay hoi. hieu ((ve cam) or (ve cham)) ((tuc van) OR (thuc van)) hanh vai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach _ dang xay hoi. hieu ((ve cam) OR (ve cham)) ((tuc van) OR (thuc van)) hanh vai cua tuc*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach _ dang xay hoi. hieu ((ve cam) or (ve cham)) ((tuc van) OR (thuc van)) hanh vai cua tuc*".