Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
thanh hang » thanh hoang, thanh thang, tranh hang
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
theo kha » theo phap, thao khoa, theo chu
kha nang » phap nang, ky nang, ki nang
van toan » van tuan, van tan, van thanh
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: theo kha nang - ((thanh hang) or (nhanh thang)) cua ((nhung cong) OR (dung cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo kha nang - ((thanh hang) OR (nhanh thang)) cua ((nhung cong) OR (dung cong)) van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo kha nang - ((thanh hang) or (nhanh thang)) cua ((nhung cong) OR (dung cong)) van toan cao".
• Adding a wildcard symbol may retrieve word variants: theo kha nang - ((thanh hang) or (nhanh thang)) cua ((nhung cong) OR (dung cong)) van toan cao*.