Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang cua » tranh cua, tang cua, trung cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than

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 - hanh trang cua nhung cong ((((dan than) or (dan gian))) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang cua nhung cong ((((dan than) OR (dan gian))) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trang cua nhung cong ((((dan than) or (dan gian))) or (tinh toan)) cau*.