Perhaps you should try some spelling variations:
manh thong » anh thong, manh tuong, mang thong
chieu xanh » chieu sach, chieu sang, chieu tinh
cong quang » luong quang, thong quang, duong quang
hieu xanh » hieu manh, hieu nganh, dieu hanh
thong qua » thong quan, thong cua, thong tu
dung cong » dung trong
qua dung » quang dung, su dung, qua song
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (chieu xanh)) - manh thong qua dung cong quang ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - manh thong qua dung cong quang ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (chieu xanh)) - manh thong qua dung cong quang ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu xanh)) - manh thong qua dung cong quang ((toan cau) OR (toan ban))*.