Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
cong quang » luong quang, thong quang, duong quang
quang toan » quang tuan, quang tran, quang doan
hieu lang » hieu quang, nhieu tang, hieu van
trinh cua » tinh cua, trinh quan, trinh luan
dung cong » dung trong
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) OR (chieu sang)) - hanh ((trinh cua) or (trinh luat)) dung cong quang toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - hanh ((trinh cua) OR (trinh luat)) dung cong quang toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - hanh ((trinh cua) or (trinh luat)) dung cong quang toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - hanh ((trinh cua) or (trinh luat)) dung cong quang toan tap*.