Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu sang » chieu sach, chieu xanh, hieu lang
cong quang » luong quang, thong quang, duong quang
hanh mang » nhanh mang, hanh trang, nhanh lang
lang cong » dang cong, bang cong, hang cong
toan cao » toan ban, toan tap
mang va » mang vua, hang va, bang va
va lang » va nang, hoa lang
tao cao » bao 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)) - hanh mang va lang cong quang ((tao cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chieu sang)) - hanh mang va lang cong quang ((tao cao) OR (toan cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (chieu sang)) - hanh mang va lang cong quang ((tao cao) OR (toan cao))*".