Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, nhung don
hanh tinh » nhanh tinh, thanh tinh, canh tinh
hang cong » dang cong, hang nong, bang cong
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap
va tinh » may tinh

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

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