Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
theo chu » theo chieu, cho chu, chao chu
trung va » truong va, trang va, trung ha
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chu) or (doi chieu)) sach - thanh ((trung va) or (tran van)) nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (doi chieu)) sach - thanh ((trung va) OR (tran van)) nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (doi chieu)) sach - thanh ((trung va) or (tran van)) nhung cong dan toan cao*.