Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
tham thuc » nham thuc, pham thuc, tam thuc
cham tuc » nham thuc, pham thuc, cham soc
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu van ((cham tuc) or (tham thuc)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuat sach)) ky nang x hoi. hieu van ((cham tuc) OR (tham thuc)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuat sach)) ky nang x hoi. hieu van ((cham tuc) or (tham thuc)) va hanh dai cua tre*.