Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
nang cong » nang song, dang cong, bang cong
cong danh » cuong danh, cong dan, cong thanh
trinh va » trinh van, trinh vat, trinh ve
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chinh sach) or (hieu lang)) - hanh trinh va nang cong danh ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chinh sach) OR (hieu lang)) - hanh trinh va nang cong danh ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (hieu lang)) - hanh trinh va nang cong danh ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (hieu lang)) - hanh trinh va nang cong danh ((toan cau) OR (toan tap))*.