Perhaps you should try some spelling variations:
khong duong » khong dung, khong xuong, thong duong
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu tinh » chieu tinh, lieu tinh, kieu tinh
doanh hua » doanh cua, doanh ha, doanh khoa
hua khong » hoa khong, cua khong, hoac khong
doc hieu » toc thieu, hoc thieu, hoc hien
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - hanh doanh hua khong duong ((van than) OR (van tuan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu tinh - hanh doanh hua khong duong ((van than) OR (van tuan)) cao*".