Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
khach ky » hanh ky, thanh ky
vu khach » vu khanh, vu khac, vay khach
vien cac » vien bach, vien dai, vien da
hai cua » dai cua, hoi cua, lai cua
ky danh » ky anh, ky dang
cac tu » cac thu, cach tu, cac du
tu van » tu va
ca hoi » cau hoi, cua hoi, co hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky danh ((ca hoi) or (xa hoi)). hieu vien cac tu van hanh ((hai cua) or (thai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky danh ((ca hoi) OR (xa hoi)). hieu vien cac tu van hanh ((hai cua) OR (thai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu khach ky danh ((ca hoi) or (xa hoi)). hieu vien cac tu van hanh ((hai cua) or (thai cua)) triet*.