Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua nhung » va nhung
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

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