Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lanh tranh » lan tranh, hanh trinh, sach tranh
hieu xanh » chieu xanh, hieu manh, hieu nganh
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
van tan » van tuan, van ban, van tai

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 - ((lanh tranh) OR (canh tranh)) cua nhung cong ((manh toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((lanh tranh) OR (canh tranh)) cua nhung cong ((manh toan) OR (van tan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((lanh tranh) OR (canh tranh)) cua nhung cong ((manh toan) or (van tan)) cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((lanh tranh) OR (canh tranh)) cua nhung cong ((manh toan) or (van tan)) cau*.