Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thanh tung » thanh cong
hieu cach » hieu cac, chieu sach, hieu ca
cao trong » cao truong, cay trong, tao trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - ((thanh tung) or (thanh thuong)) cao trong cong san phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((thanh tung) OR (thanh thuong)) cao trong cong san phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((thanh tung) or (thanh thuong)) cao trong cong san phan cac*.