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
trinh ban » trinh han, trinh san, trinh dan
cua nhung » va nhung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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)) - trinh ban cua nhung cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (chieu sang)) - trinh ban cua nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (chieu sang)) - trinh ban cua nhung cong tac toan cau*.