Perhaps you should try some spelling variations:
thanh tang » thanh thang, thanh trang, thanh tung
van thang » van khang, van hang, van than
van thanh » ban thanh, van tuan
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap
so lieu » so dieu
cu lieu » du lieu, tu lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so lieu) or (cu lieu)) tinh - thanh tang ((van thang) OR (van thanh)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so lieu) OR (cu lieu)) tinh - thanh tang ((van thang) OR (van thanh)) cong tap toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so lieu) or (cu lieu)) tinh - thanh tang ((van thang) OR (van thanh)) cong tap toan cao*".