Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chieu xanh, hieu cach
cong quang » luong quang, thong quang, duong quang
hanh bang » anh bang, hanh mang, lanh bang
lang cong » dang cong, bang cong, hang cong
quang tao » quang cao, quang bao, quang tay
bang va » hang va, ban va, trang va
va lang » va nang, hoa lang
tao cao » bao cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (((chieu sang) OR (chieu sach)))) - hanh bang va lang cong quang tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (((chieu sang) OR (chieu sach)))) - hanh bang va lang cong quang tao cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (((chieu sang) OR (chieu sach)))) - hanh bang va lang cong quang tao cao*".