Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van hanh » van thanh, ban hanh, van anh
san khoa » toan khoa, hang khoa, da khoa
tang lai » trang lai, tang tai, tang loi
hieu vu » hieu va, hieu ve, hieu su
lai hoi » dai hoi, lai hoa, lai roi
san kho » san cho, lan kho, san ho
vu chao » vu cao, vu cham, vu chat
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san kho) OR (san khoa)) tang lai hoi. hieu vu chao xu ((van hanh) or (ban thanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san kho) OR (san khoa)) tang lai hoi. hieu vu chao xu ((van hanh) OR (ban thanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san kho) OR (san khoa)) tang lai hoi. hieu vu chao xu ((van hanh) or (ban thanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((san kho) OR (san khoa)) tang lai hoi. hieu vu chao xu ((van hanh) or (ban thanh)) vi cua te*.