Perhaps you should try some spelling variations:
cong nguong » cong nguon, cong thuong, cong luong
hanh trang » thanh trung, canh tranh, hanh trinh
nguong dan » huong dan
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
doc hieu » toc thieu, hoc hien
dan van » dang van, doan van, dao van

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) or (hoc thieu)) xanh - hanh trang cua cong nguong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - hanh trang cua cong nguong dan van ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - hanh trang cua cong nguong dan van ban*.