Perhaps you should try some spelling variations:
tcvn trinh » tien trinh
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
trung cua » truong cua, trung tuan, trung cap
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cau » 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 tcvn trinh - thanh ((tang luan) or (trung cua)) nhung cong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tcvn trinh - thanh ((tang luan) OR (trung cua)) nhung cong bai toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tcvn trinh - thanh ((tang luan) or (trung cua)) nhung cong bai toan cau*.