Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
hanh tai » thanh tai, hang tai, han tai
tai cua » thai cua, tai cuc, tri cua
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
lo van » le van, vo van, do van
so van » su van, vo van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu tu cham ((lo van) or (so van)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu tu cham ((lo van) OR (so van)) hanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ky nang xa hoi. hieu tu cham ((lo van) or (so van)) hanh tai cua tre*".