Perhaps you should try some spelling variations:
tinh thuong » trinh thuong, tinh huong, dinh thuong
thuong lan » thuong han, phuong lan, thuong mai
quang van » quang ban, quang uan, quang va
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
quan van » luan van, quan va, quan luan
va kiem » van kien
lan va » luan va, lanh va, lan van

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

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