Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
dung cong » dung trong
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: hoc thieu xanh - hanh ((trung cua) or (trung cap)) ((dung cong) or (thong cong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trung cua) OR (trung cap)) ((dung cong) OR (thong cong)) dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung cua) or (trung cap)) ((dung cong) or (thong cong)) dan van ban*.