Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
toan cau » toan cao, toan tap, toan tai
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: theo ((hieu nganh) or (chieu sang)) - canh tranh va thong cong van ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu nganh) OR (chieu sang)) - canh tranh va thong cong van ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu nganh) or (chieu sang)) - canh tranh va thong cong van ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu nganh) or (chieu sang)) - canh tranh va thong cong van ((toan cau) OR (toan ban))*.