Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
trinh quan » tinh quang, trinh luat, trinh han
tieu xanh » tieu danh, chieu xanh, dieu hanh
dung cong » dung trong
thang va » hang va, trang va, thong va
quan cau » quang cao, toan cau, quan ha
tang va » trang va, tang van, tang vat

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 va) or (thang va)) ((nhung cong) OR (dung cong)) trinh quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ((tang va) OR (thang va)) ((nhung cong) OR (dung cong)) trinh quan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh ((tang va) or (thang va)) ((nhung cong) OR (dung cong)) trinh quan cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((tang va) or (thang va)) ((nhung cong) OR (dung cong)) trinh quan cau*.