Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
tong cong » trong cong, cong cong, dang cong
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 ((tong 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 ((tong cong) OR (dung cong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((hanh tranh) OR (hanh trinh)) va ((tong cong) or (dung cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh tranh) OR (hanh trinh)) va ((tong cong) or (dung cong)) dan toan cao*.