Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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 hang) or (hang hang)) va ((bang cong) or (dang cong)) tac than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh hang) OR (hang hang)) va ((bang cong) OR (dang cong)) tac than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh hang) or (hang hang)) va ((bang cong) or (dang cong)) tac than cau*.