Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhieu tang » chieu sang, nhiet nang
cong ngang » cong nhan, cong quang, cong nong
hieu lang » chieu sang, hieu quang, hieu van
trinh cua » tinh cua, trinh luat, trinh quan
cong lang » cong vang, cong luong, cong quang
cua dung » cua dang, cua dong, qua dung
toan cau » 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: ho ((hieu lang) OR (nhieu tang)) - hanh trinh cua dung ((cong ngang) or (cong lang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (nhieu tang)) - hanh trinh cua dung ((cong ngang) OR (cong lang)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (nhieu tang)) - hanh trinh cua dung ((cong ngang) or (cong lang)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (nhieu tang)) - hanh trinh cua dung ((cong ngang) or (cong lang)) toan cau*.