Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chat truc » cau truc, chat xuc
thu sach » tu sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
van chat » cao chat
vanh dai » van dai, vanh tai, lanh dao
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat, trung va
va vanh » va van, va danh, va hanh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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)) y nang xa hoi. hieu van chat truc va vanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang xa hoi. hieu van chat truc va vanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) y nang xa hoi. hieu van chat truc va vanh dai cua tre*.