Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tang van » hoang van, trong van, tang luan
dang van » hoang van, hang va
hanh ly » khanh ly, hanh ky, hang ly
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ly cua » le cua

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 y ((tang van) OR (dang van)) hoi. hieu ve cham ((duc va) or (truc va)) hanh ly cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y ((tang van) OR (dang van)) hoi. hieu ve cham ((duc va) OR (truc va)) hanh ly cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y ((tang van) OR (dang van)) hoi. hieu ve cham ((duc va) or (truc va)) hanh ly cua tre*".