Perhaps you should try some spelling variations:
trinh dong » trinh duong, trinh dung, trinh cong
chien soat » thien hoat
quang van » quang ban, quang uan, quang va
dong luan » dung luan, tong luan, dong xuan
quan van » luan van, quan va, quan luan
va chien » van chien, va hien, va chiet
luan va » luan van, luat va
tin » tinh

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 qua ) or ( trinh dong luan va chien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung ((quang van) OR (quan van)) hieu qua ) OR ( trinh dong luan va chien soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung ((quang van) or (quan van)) hieu qua ) or ( trinh dong luan va chien soat ))*.