Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hang cong » dang cong, hang nong, bang cong
chi xanh » chi anh, chi danh, chi hanh
tranh va » tranh van, trang va, trinh va
toan cao » toan tap
toan ban » van ban
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 va ((hang cong) or (thong cong)) thanh ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh tranh va ((hang cong) OR (thong cong)) thanh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh tranh va ((hang cong) or (thong cong)) thanh ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh tranh va ((hang cong) or (thong cong)) thanh ((toan cao) OR (toan ban))*.