Perhaps you should try some spelling variations:
thong doanh » trong doanh, thong danh, dong doanh
doanh phan » doanh nhan, doan phan, doanh thanh
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
canh ban » can ban, canh dan, canh van
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc thieu)) danh - canh ban ((cua khong) OR (hua khong)) thong doanh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) danh - canh ban ((cua khong) OR (hua khong)) thong doanh phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc thieu)) danh - canh ban ((cua khong) OR (hua khong)) thong doanh phan dau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc thieu)) danh - canh ban ((cua khong) OR (hua khong)) thong doanh phan dau*.