Perhaps you should try some spelling variations:
thanh tieng » thanh tien, thanh vien, anh tieng
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
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 (thanh tung))) 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 (thanh tung))) OR (hanh tieng)) viet trung cong doan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((((thanh tieng) OR (thanh tung))) or (hanh tieng)) viet trung cong doan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((((thanh tieng) OR (thanh tung))) or (hanh tieng)) viet trung cong doan van ban*.