Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu bai » tu ban, tu bat, te bai

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

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