Perhaps you should try some spelling variations:
tinh huong » dinh huong, tinh quang, anh huong
hieu suat » hieu luat, hieu qua
tinh quan » tinh quang, trinh quan, tin quan
kiem soat » kiem toan
quan han » quan hanh, quanh han, quan hai
quan ha » quan he
luan va » luan van, luat va
va kiem » van kien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh huong ((quan han) or (quan ha)) hieu suat ) or ( tinh quan luan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh huong ((quan han) OR (quan ha)) hieu suat ) OR ( tinh quan luan va kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( tinh huong ((quan han) or (quan ha)) hieu suat ) or ( tinh quan luan va kiem soat ))*.