Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
doi chi » doi khi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - ((hanh tranh) or (hanh trinh)) va ((trong cong) or (dung cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh tranh) OR (hanh trinh)) va ((trong cong) OR (dung cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh tranh) or (hanh trinh)) va ((trong cong) or (dung cong)) dan toan cao*.