Perhaps you should try some spelling variations:
chinh truong » chinh trong, sinh truong, trinh truong
hinh trong » chinh trong, dinh trong, sinh trong
hieu cach » chieu sach, hieu ca, biet cach
dang cong » dung cong
hieu cac » hieu luc, hieu va, hieu van
cua dang » cua cong, cua ban
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: doc ((hieu cach) OR (hieu cac)) - ((chinh truong) or (hinh trong)) cua dang cong san phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu cach) OR (hieu cac)) - ((chinh truong) OR (hinh trong)) cua dang cong san phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu cach) OR (hieu cac)) - ((chinh truong) or (hinh trong)) cua dang cong san phan cac".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu cach) OR (hieu cac)) - ((chinh truong) or (hinh trong)) cua dang cong san phan cac*.