Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
van hanh » van thanh, ban hanh, van anh
san khoa » toan khoa, hang khoa, da khoa
hieu van » hieu va, thien van, lieu va
cao duc » dao duc, cao suc, giao duc
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va
san kho » san cho, lan kho, san ho
duc van » duc va, duc tan, duc manh
vi cau » va cau, ve cau, di cau

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 xa hoi. ((hieu ve) or (hieu van)) cao duc van hanh vi cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san kho) OR (san khoa)) tang xa hoi. ((hieu ve) OR (hieu van)) cao duc van hanh vi cau theo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san kho) OR (san khoa)) tang xa hoi. ((hieu ve) or (hieu van)) cao duc van hanh vi cau theo*".