Perhaps you should try some spelling variations:
tranh thuat » trong thuat, tranh chua, tranh thai
thieu xanh » chieu xanh, hieu manh, thien anh
luong cong » dung cong, trong cong, cong cong
hoc thieu » toc thieu, hoc hien
xung cong » xuong cong, dung cong, duong cong
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 thuat ((xung cong) or (luong cong)) dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh thuat ((xung cong) OR (luong cong)) dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh thuat ((xung cong) or (luong cong)) dan ((toan cao) or (toan tap))*.