Perhaps you should try some spelling variations:
doanh khoa » toan khoa
luan thang » luan thanh, xuan thang, luan tang
theo phap » thi phap
phap sinh » phau sinh, phai sinh, phap tinh
cong doan » cong dan, cong hoan, dong doanh
long dan » long doan, cong dan, nong dan
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: theo phap sinh - doanh khoa luan thang ((long dan) or (cong doan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo phap sinh - doanh khoa luan thang ((long dan) OR (cong doan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo phap sinh - doanh khoa luan thang ((long dan) or (cong doan)) toan cao*.