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