Perhaps you should try some spelling variations:
hanh cac » hang cac, hanh cat, hanh cham
hanh vai » hanh vi, hanh va, hanh tai
va triet » va thiet, va trien, ve triet
sach bai » sach dao, cac bai
cac hoi » cac thoi, cac khoi, cau hoi
sach xa » sach dao, sach nha
cac toc » cac toi, cac nuoc, cac thoi
xa hanh » xa thanh, xa khanh, va hanh
hieu va » lieu va, hieu qua
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 xa) or (sach bai)) hanh cac hoi. hieu va ((cac toc) or (hoc nuoc)) xa hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach xa) OR (sach bai)) hanh cac hoi. hieu va ((cac toc) OR (hoc nuoc)) xa hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: toc ((sach xa) or (sach bai)) hanh cac hoi. hieu va ((cac toc) or (hoc nuoc)) xa hanh vai va triet*.