Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
van tuan » van quan, van ban, anh tuan

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 xanh - canh tranh cua nhung cong ((dan gian) or (((manh toan) or (van tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh cua nhung cong ((dan gian) OR (((manh toan) OR (van tuan)))) cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh cua nhung cong ((dan gian) or (((manh toan) or (van tuan)))) cao*.