Perhaps you should try some spelling variations:
phuong trong » thuong trong, huong trong, phong trong
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
nang xuat » hang xuat, nang xuan, san xuat
trong tan » trong quan, trong cac, trong ca
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (hieu lang)) - hanh ((nang xuat) OR (nang suat)) phuong trong tan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chiet tach) or (hieu lang)) - hanh ((nang xuat) OR (nang suat)) phuong trong tan toan tap~".
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (hieu lang)) - hanh ((nang xuat) OR (nang suat)) phuong trong tan toan tap*.