Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
cong ngang » cong nhan, cong quang, cong lang
bien tinh » bi tinh, yen tinh, diep tinh
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - thanh dung luan thong cong ngang ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - thanh dung luan thong cong ngang ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: so bien tinh - thanh dung luan thong cong ngang ((toan tai) or (toan ban))*.