Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trong van » trong cac
cua dung » qua dung, cua rung, cua nhung
cua dang » cua cong, cua ban
cua dong » chua dong, cua cong, cua nong
van tai » von tai, van tuan
tai cao » thai cao, tao cao, tai sao

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 dung) or (cua dang))) or (cua dong)) trong van tai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - canh tranh ((((cua dung) OR (cua dang))) OR (cua dong)) trong van tai cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - canh tranh ((((cua dung) or (cua dang))) or (cua dong)) trong van tai cao*.