Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
bang cong » dang cong, bang song, hang cong
dung cong » dung trong
toan cao » toan tap
toan ban » van ban

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 trinh cua ((bang cong) or (dung cong)) danh ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh trinh cua ((bang cong) OR (dung cong)) danh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh trinh cua ((bang cong) or (dung cong)) danh ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh trinh cua ((bang cong) or (dung cong)) danh ((toan cao) OR (toan ban))*.