Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh thang » nhanh thang, thanh thanh, thanh hang
hien hanh » dieu hanh
va thong » va thuong, va phuong, he thong
cong van » cong vang, song van, cong tan
cong san » cong tac
tan cao » toan cao, tao cao, tay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - ((thanh trung) or (thanh thang)) va thong ((cong van) OR (cong san)) tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((thanh trung) OR (thanh thang)) va thong ((cong van) OR (cong san)) tan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((thanh trung) or (thanh thang)) va thong ((cong van) OR (cong san)) tan cao*".