Perhaps you should try some spelling variations:
khanh vai » khanh van, hanh vi, hanh va
toc sach » hoc sach, doc sach, thuoc sach
sach thi » sach thu, sach tai, sach thieu
thi hanh » thi thanh
hanh cau » nhanh cau, hang cau, hanh cac
cac thoi » cac toi, cac hop, cac tro
xa khanh » xa thanh, van khanh, dat khanh
va triet » va thiet, va trien, ve triet
cac tuc » cac toc, cac tu, cac tac
vai va » mai va, dai va, hai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thi hanh cau hoi. hieu qua ((cac tuc) or (cac thoi)) xa khanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thi hanh cau hoi. hieu qua ((cac tuc) OR (cac thoi)) xa khanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: toc sach thi hanh cau hoi. hieu qua ((cac tuc) or (cac thoi)) xa khanh vai va triet*.