Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
huy thong » thuy thong, huy phong, huu thong
duy thong » duy tuong, ly thong
thu sang » thu hang, thu san, thu bang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
quang » quan

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

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