Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
nhung don » nhung van, nhung bo
nho hieu » nha hieu, nho sieu, nhu hieu
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

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