Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
duong van » duong va, luong va, dang van
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
ha dong » hoat dong, van dong

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 tranh ((((cua dung) OR (qua dung))) or (ha dong)) duong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh tranh ((((cua dung) OR (qua dung))) OR (ha dong)) duong van toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh tranh ((((cua dung) OR (qua dung))) or (ha dong)) duong van toan cao*".