Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tang van » dang van, hoang van, trong van
truc va » thuc va, thuc vat, trung va
hang ly » huong ly
hanh ly » khanh ly, hanh ky, hanh y
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
y tang » ky tang, 6 tang, 7 tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y tang van hoi. hieu ve cham ((duc va) or (truc va)) ((hanh ly) OR (hang ly)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y tang van hoi. hieu ve cham ((duc va) OR (truc va)) ((hanh ly) OR (hang ly)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y tang van hoi. hieu ve cham ((duc va) or (truc va)) ((hanh ly) OR (hang ly)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y tang van hoi. hieu ve cham ((duc va) or (truc va)) ((hanh ly) OR (hang ly)) cua tre*.