Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
hanh trinh » canh tranh, hanh chinh
hanh tranh » canh tranh, hanh trang, lanh tranh
cuong tac » cong tac, tuong tac, cuong cac
quang cao » nang cao, quang nam
chi xanh » chi anh, chi danh, chi hanh
doi chi » doi khi
huy » thuy

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 nhung cuong tac ((quang cao) or (quang huy))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - ((hanh tranh) OR (hanh trinh)) va nhung cuong tac ((quang cao) OR (quang huy)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - ((hanh tranh) OR (hanh trinh)) va nhung cuong tac ((quang cao) or (quang huy))".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - ((hanh tranh) OR (hanh trinh)) va nhung cuong tac ((quang cao) or (quang huy))*.