Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » hanh chinh
hoc thieu » toc thieu, hoc hien
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong ban » cong bang, cong san, cong tan
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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) or (hanh trinh)) tuan dung cong ban ((than cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((canh tranh) OR (hanh trinh)) tuan dung cong ban ((than cao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((canh tranh) or (hanh trinh)) tuan dung cong ban ((than cao) or (toan cao))*.