Perhaps you should try some spelling variations:
doanh nhung » doanh chung, doanh thuong, doanh nhan
canh thanh » canh tranh, danh thanh, anh thanh
toan nhung » toan chung, toan khung, toan thuong
hoc thieu » toc thieu, hoc hien
quan toan » quang toan, quan doan, xuan toan
ho chieu » theo chieu, mot chieu, doi chieu
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) tinh - canh thanh ((toan nhung) OR (doanh nhung)) thong quan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - canh thanh ((toan nhung) OR (doanh nhung)) thong quan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - canh thanh ((toan nhung) OR (doanh nhung)) thong quan toan tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) tinh - canh thanh ((toan nhung) OR (doanh nhung)) thong quan toan tap*.