Perhaps you should try some spelling variations:
thanh tieng » thanh tien, thanh tung, thanh vien
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tieng » anh tieng, ban tieng, hanh trang
trung cong » truong cong, trong cong, trung uong
hoc thieu » toc thieu, hoc hien
cong doan » cong dan, cong hoan, dong doanh
doan van » doan va, hoang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - ((thanh tieng) or (hanh tieng)) viet trung cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((thanh tieng) OR (hanh tieng)) viet trung cong doan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((thanh tieng) or (hanh tieng)) viet trung cong doan van ban*.