Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
duong manh » duong van
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
toan cau » toan tap, toan tai
toan cao » toan tap
toan ban » van 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 - hanh tranh cua nhung duong manh ((toan cau) or (((toan cao) OR (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh tranh cua nhung duong manh ((toan cau) OR (((toan cao) OR (toan ban)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh tranh cua nhung duong manh ((toan cau) or (((toan cao) OR (toan ban))))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tranh cua nhung duong manh ((toan cau) or (((toan cao) OR (toan ban))))*.