Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
tieu xanh » tieu danh, chieu xanh, dieu hanh
tiep danh » tieu danh, thien danh, tiep can
hanh tang » hanh trang, anh tang, hanh mang
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, hang cua, tang luan
tac toan » tap toan, tam toan, hach 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) or (tiep danh)) - hanh tang cua ((nhung cong) OR (hang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu xanh) OR (tiep danh)) - hanh tang cua ((nhung cong) OR (hang cong)) tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu xanh) or (tiep danh)) - hanh tang cua ((nhung cong) OR (hang cong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu xanh) or (tiep danh)) - hanh tang cua ((nhung cong) OR (hang cong)) tac toan cau*.