Perhaps you should try some spelling variations:
tran thanh » ban thanh, van thanh, quan thanh
truong cua » truong ca, truong quan, truong cao
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap
ho lieu » co lieu, ho kieu, ho chieu
so lieu » so dieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho lieu) OR (so lieu)) tinh - thanh ((tran thanh) or (truong cua)) dung cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (so lieu)) tinh - thanh ((tran thanh) OR (truong cua)) dung cong tap toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) OR (so lieu)) tinh - thanh ((tran thanh) or (truong cua)) dung cong tap toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) OR (so lieu)) tinh - thanh ((tran thanh) or (truong cua)) dung cong tap toan cau*.