Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
duong manh » duong van
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua nhung » va nhung
toan cau » toan cao, toan ban, toan tai
toan tap » 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: doi ((chieu sang) or (hieu lang)) - hanh tranh cua nhung duong manh ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - hanh tranh cua nhung duong manh ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - hanh tranh cua nhung duong manh ((toan cau) or (toan tap))*.