Perhaps you should try some spelling variations:
nhanh song » nhanh dong, nhanh chong, thanh son
phan song » phan cong, phan hong, phan xuong
chi xanh » chi anh, chi danh, chi hanh
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
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 - ((nhanh song) OR (phan song)) su dung ((cong dan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((nhanh song) OR (phan song)) su dung ((cong dan) OR (cong tac)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((nhanh song) OR (phan song)) su dung ((cong dan) or (cong tac)) toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((nhanh song) OR (phan song)) su dung ((cong dan) or (cong tac)) toan ban*.