Perhaps you should try some spelling variations:
khang luan » khanh luan, khung luan, khang khuan
thong cong » trong cong, tong cong, thong thong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hang luan » tang luan, dung luan
van thong » van thuong, van phong, va thong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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 tieu xanh - ((hang luan) or (khang luan)) van thong cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((hang luan) OR (khang luan)) van thong cong tap toan cao*.