Perhaps you should try some spelling variations:
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
doi chieu » ho chieu, mot chieu, thi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
san tuan » van tuan, san luan, san quan
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((doi chieu) OR (doi chi))) or (doc hieu)) sach - thanh san tuan nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((doi chieu) OR (doi chi))) OR (doc hieu)) sach - thanh san tuan nhung cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((doi chieu) OR (doi chi))) or (doc hieu)) sach - thanh san tuan nhung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: ((((doi chieu) OR (doi chi))) or (doc hieu)) sach - thanh san tuan nhung cong tac toan ban*.