Perhaps you should try some spelling variations:
tai thien » cai thien, thi thien, tai thiet
hanh lam » thanh lap, hanh kem, hanh va
sach thu » sach thue, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
lam tai » lap tai, nam tai, pham tai
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
tang ha » lang ha, tang ma, trung ha
ve cac » va cac, vien cac
ha hoi » hoa hoi, ha noi, xa hoi
ve cao » va cao, ve bao, ve co

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach thu)) tang ha hoi. hieu ((ve cao) or (ve cac)) duc van hanh lam tai thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach thu)) tang ha hoi. hieu ((ve cao) OR (ve cac)) duc van hanh lam tai thien.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach thu)) tang ha hoi. hieu ((ve cao) or (ve cac)) duc van hanh lam tai thien*.