Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, biet cach
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong san » cong tac
san phan » san pham, van phan, sat phan
hieu ca » hieu cac, hieu cua, hieu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu cach) or (hieu ca)) - thanh ((trung cua) or (trung cap)) nhung cong san phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu cach) OR (hieu ca)) - thanh ((trung cua) OR (trung cap)) nhung cong san phan tu.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu cach) or (hieu ca)) - thanh ((trung cua) or (trung cap)) nhung cong san phan tu*.