Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lai » hanh lam, hanh tai, thanh lap
vu khach » vu khanh, vu khac, vay khach
van hanh » van thanh, ban hanh, van anh
tham luc » than luc, tham nuoc, tham thuc
luc van » luoc van, luu van, duc van
va tham » van tham, va cham, va thanh
vu sach » vu bach, su sach
nang xa » nang x, lang xa, mang xa
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: ((vu sach) OR (vu khach)) ty ((nang xa) or (nang ma)) hoi. lieu va tham luc van hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) ty ((nang xa) OR (nang ma)) hoi. lieu va tham luc van hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) ty ((nang xa) or (nang ma)) hoi. lieu va tham luc van hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) ty ((nang xa) or (nang ma)) hoi. lieu va tham luc van hanh lai chau triet*.