Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
trinh han » trinh quan
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
han ban » hang ban, van ban, can 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 (chieu xanh)) - hanh tang luan ung cong trinh han ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu xanh)) - hanh tang luan ung cong trinh han ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu xanh)) - hanh tang luan ung cong trinh han ban*.