Perhaps you should try some spelling variations:
trinh khung » trinh nhung, trinh phuong, trinh dung
khung hoang » phuong hoang
hieu luat » hieu qua
hoang van » hang va
hieu hoat » hieu hoa, thien hoat, hieu suat
dan tinh » doan tinh, dang tinh, dan trinh
tinh han » trinh han, tinh than, tinh hai
han hieu » phan hieu, hang hieu, nhan hieu
van hieu » cao hieu
tin dan » tin don, trinh dan, tin dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dan tinh han hieu luat ) or ( trinh khung hoang van hieu hoat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dan tinh han hieu luat ) OR ( trinh khung hoang van hieu hoat ))*.