Perhaps you should try some spelling variations:
nhung doanh » nhung danh, dung doanh, nhung don
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
trong van » trong cac
van tuan » van quan, van ban, anh tuan
tuan tap » toan tap, tuan tai, tuyen tap
toan » tran

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 tach - ((nhung doanh) or (toan doanh)) ((cua thong) OR (cua khong)) trong van tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - ((nhung doanh) OR (toan doanh)) ((cua thong) OR (cua khong)) trong van tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - ((nhung doanh) or (toan doanh)) ((cua thong) OR (cua khong)) trong van tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((nhung doanh) or (toan doanh)) ((cua thong) OR (cua khong)) trong van tuan tap*.