Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
han ban » hang ban, van ban, han san
can ban » van ban, 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: theo ((chieu sang) or (hieu manh)) - hanh tang luan ung cong trinh ((han ban) OR (can ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu manh)) - hanh tang luan ung cong trinh ((han ban) OR (can ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (hieu manh)) - hanh tang luan ung cong trinh ((han ban) OR (can ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu manh)) - hanh tang luan ung cong trinh ((han ban) OR (can ban))*.