Perhaps you should try some spelling variations:
doanh khoa » toan khoa
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
khoa cua » hoa cua, kho cua, khoe cua
cua hang » cua dang, cua nhung, cua cong
cong tac » cong ty
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - doanh khoa cua hang cong tac ((phan tu) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - doanh khoa cua hang cong tac ((phan tu) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - doanh khoa cua hang cong tac ((phan tu) or (phan cac))*.