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
nhan tuc » nhan thuc, nhan luc, nhanh thuc
tuc van » thuc van, truc van, tuc va
vu nhan » cu nhan, vu ngan, tu nhan
hieu vu » hieu va, hieu ve, hieu su
su sach » so sach, vu sach
lang ha » long ha
lang xa » dang xay, lang van
nang ma » tang ma, sang ma, nang cao

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