Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thi » sach tai, sach thieu, sach tham
va triet » va thiet, va trien, ve triet
sach thu » sach thue, sach thieu, sach tham
hanh xa » hanh va, hanh ma, hanh xu
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh
cac tuc » cac tu, cac tac, cac nuoc
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) or (sach thu)) hanh xa hoi. hieu va ((cac tuc) or (cac toc)) xa hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach thi) OR (sach thu)) hanh xa hoi. hieu va ((cac tuc) OR (cac toc)) xa hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sach thi) or (sach thu)) hanh xa hoi. hieu va ((cac tuc) or (cac toc)) xa hanh vai va triet*.