Perhaps you should try some spelling variations:
vanh tai » van tai, hanh tai, anh tai
thi nang » thi cong, ki nang, thi hanh
so sach » bo sach, co sach, hoc sach
va pham » van pham, va phat, va phap
chuc va » thuc va
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
so sanh » do sanh
co hoi » co hoc, co loi
cuc tu » cuc du, luc tu, duc tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) thi nang co hoi. hieu va pham ((chuc va) or (thuc vat)) vanh tai cuc tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thi nang co hoi. hieu va pham ((chuc va) OR (thuc vat)) vanh tai cuc tu.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thi nang co hoi. hieu va pham ((chuc va) or (thuc vat)) vanh tai cuc tu*.