Perhaps you should try some spelling variations:
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
tam toan » tap toan, tam than, pham toan
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 tieu xanh - hanh tang luan ((khong cong) or (thong cong)) tam toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh tang luan ((khong cong) OR (thong cong)) tam toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang luan ((khong cong) or (thong cong)) tam toan cau*.