Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh hoan » doanh doanh, doanh khoa, doanh nhan
thong cong » trong cong, tong cong, phong chong
hoc thieu » toc thieu, hoc hien
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

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