Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach thieu, sach tham
cham duc » pham duc, cham soc, pham duy
duc van » duc va, duc tan, duc manh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, xach tay
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van

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 ty) or (sach thu)) ((nang ma) or (lang xa)) hoi. hieu vu cham duc van hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) ((nang ma) OR (lang xa)) hoi. hieu vu cham duc van hanh lai chau triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach thu)) ((nang ma) or (lang xa)) hoi. hieu vu cham duc van hanh lai chau triet*.