Perhaps you should try some spelling variations:
thien hoat » trien hoat, thien thuat, tien hoa
tinh dung » trinh dung, tin dung, tinh huong
kiem soat » kiem toan
quang uan » quang tuan, quang ban, quang tran
hieu hoat » hieu hoa, hieu luat, hieu suat
luan va » luan van, luat va
va kiem » van kien
uan ha » quan ha, xuan ha, van ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung luan va kiem soat ) or ( tinh quang uan ha ((hieu hoat) OR (thien hoat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan va kiem soat ) OR ( tinh quang uan ha ((hieu hoat) OR (thien hoat)) ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan va kiem soat ) or ( tinh quang uan ha ((hieu hoat) OR (thien hoat)) ))*".