Perhaps you should try some spelling variations:
huong tinh » khuong tinh, thuong tinh, hung tinh
duong tinh » duong minh, duong sinh, dong tinh
thiet yeu » thiet ke, theo yeu
yeu tinh » yeu tin, lieu tinh, kieu tinh
tranh va » tranh van, trang va, trinh va
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: thiet yeu tinh - canh tranh va nhung ((huong tinh) OR (duong tinh)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thiet yeu tinh - canh tranh va nhung ((huong tinh) OR (duong tinh)) ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thiet yeu tinh - canh tranh va nhung ((huong tinh) OR (duong tinh)) ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: thiet yeu tinh - canh tranh va nhung ((huong tinh) OR (duong tinh)) ((toan cau) or (toan ban))*.