Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
cong tap » cuong tap, cong tac, cong tan
toan cao » toan ban
toan tap » toan 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 - canh tranh cua cong cong tap ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh cua cong cong tap ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh cua cong cong tap ((toan cao) or (toan tap))*.