Perhaps you should try some spelling variations:
hien soat » thien hoat, kiem soat, bien soan
trinh han » trinh quan
hieu soat » hieu suat, hieu hoat, hieu luat
van hien » van tien
van hieu » cao hieu
han tan » phan tan, han tai, van tan
tan van » tran van, tang van, dang van
tin » tinh
luan » quan, lan

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 luan van hien soat ) or ( trinh han tan van hieu soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan van hien soat ) OR ( trinh han tan van hieu soat ))*.