Perhaps you should try some spelling variations:
nhanh mang » nhanh lang, hanh mang, nhanh quang
luan hang » luan nang, luan han, luan hung
hach toan » thanh toan, manh toan
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
lan hung » van hung, luan chung, lan phuong
tac toan » tap toan, tam toan, tich toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo yeu tinh - nhanh mang ((luan hang) or (lan hung)) cong ((tac toan) OR (hach toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - nhanh mang ((luan hang) OR (lan hung)) cong ((tac toan) OR (hach toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo yeu tinh - nhanh mang ((luan hang) or (lan hung)) cong ((tac toan) OR (hach toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - nhanh mang ((luan hang) or (lan hung)) cong ((tac toan) OR (hach toan)) cao*.