Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
chieu sang » chieu sach, chieu xanh, hieu lang
trinh qua » trinh quan, trinh cua, trinh luat
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
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: ho chieu sang - hanh ((trinh qua) or (trinh quang)) trong cong tap ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trinh qua) OR (trinh quang)) trong cong tap ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh ((trinh qua) or (trinh quang)) trong cong tap ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((trinh qua) or (trinh quang)) trong cong tap ((toan cau) OR (toan cao))*.