Perhaps you should try some spelling variations:
trinh phuong » trinh duong, trinh dung, trinh cong
phuong ty » phuong tay, phuong te, phuong thuy
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
tranh va » tranh van, trang va, trinh va
toan va » doan va, tran van, toan ban
ty van » ly van, ta van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh phuong ty van hieu soat ) or ( tinh quang ((toan va) or (tranh va)) kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh phuong ty van hieu soat ) OR ( tinh quang ((toan va) OR (tranh va)) kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh phuong ty van hieu soat ) or ( tinh quang ((toan va) or (tranh va)) kiem soat ))*.