Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
manh toan » thanh toan, anh tuan, tinh toan
tranh va » tranh van, trang va, trinh va
van tuan » van ban, anh tuan
van quan » van ban
doi chi » doi khi
chi dan » choi dan, chi van, thi dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi dan - canh tranh va nhung cong ((manh toan) or (((van tuan) OR (van quan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi dan - canh tranh va nhung cong ((manh toan) OR (((van tuan) OR (van quan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi dan - canh tranh va nhung cong ((manh toan) or (((van tuan) OR (van quan)))) cau".
• Adding a wildcard symbol may retrieve word variants: doi chi dan - canh tranh va nhung cong ((manh toan) or (((van tuan) OR (van quan)))) cau*.