Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nam thuc » nam thuoc, am thuc, nam tu
vat hanh » vat thanh, van hanh, va hanh
hanh tai » thanh tai, hang tai, han tai
tai chau » lai chau, mai chau, hai chau
chau tre » chay tren, chau tho, cho tre
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu ve ((nam thuc) or (nam thu)) vat hanh tai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang xa hoi. hieu ve ((nam thuc) OR (nam thu)) vat hanh tai chau tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang xa hoi. hieu ve ((nam thuc) or (nam thu)) vat hanh tai chau tre*.