Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cong cong » cong dong, trong cong, dung cong
cong san » cong tac
san van » tan van, luan van, tran 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 - ((hanh tang) or (hanh mang)) cua cong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh tang) OR (hanh mang)) cua cong cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh tang) or (hanh mang)) cua cong cong san van ban*.