Perhaps you should try some spelling variations:
chat truc » cau truc
hieu van » hieu va, thien van, hieu ve
chat xuc » chat huu, cam xuc, chao xu
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va hanh » van hanh, va thanh, va danh
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 ty nang x hoi. ((hieu van) or (lieu va)) ((chat truc) or (chat xuc)) va hanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. ((hieu van) OR (lieu va)) ((chat truc) OR (chat xuc)) va hanh dai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu van) or (lieu va)) ((chat truc) or (chat xuc)) va hanh dai cua vat*.