Perhaps you should try some spelling variations:
thanh hang » thanh hoang, thanh thang, tranh hang
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
hieu manh » chieu xanh, hieu nganh, hien hanh
toan cau » toan ban, toan tap, toan tai
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 ((hieu manh) OR (dieu hanh)) - thanh hang va nhung cong quang ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (dieu hanh)) - thanh hang va nhung cong quang ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) OR (dieu hanh)) - thanh hang va nhung cong quang ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) OR (dieu hanh)) - thanh hang va nhung cong quang ((toan cau) or (toan cao))*.