Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
dung cua » dung luan, dung cho
toan cau » toan cao, toan ban, toan tap
ban cua » ban quan

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

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