Perhaps you should try some spelling variations:
chien tranh » hien trang
quang tuan » quang thanh, quan luan, quang cua
dung quat » dung quan, dung qua, dung luat
hieu soat » hieu suat, hieu hoat, hieu luat
hien hanh » dieu hanh
quat van » quan van, qua van, quyet van
van hieu » cao hieu
tuan van » luan van, tran van, tan 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 quat van hieu soat ) or ( tinh quang tuan van ((chien tranh) or (hien hanh)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung quat van hieu soat ) OR ( tinh quang tuan van ((chien tranh) OR (hien hanh)) )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung quat van hieu soat ) or ( tinh quang tuan van ((chien tranh) or (hien hanh)) ))*.