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