Perhaps you should try some spelling variations:
than dinh » thuan dinh, thanh dinh, than kinh
cau tren » cu tren, dau tren, ca tren
dinh cau » dinh chau, dinh cuu, dinh cu
van than » van thanh, van thang, van tuan
hieu van » hieu va, thien van, hieu ve
san khoa » toan khoa, hang khoa, da khoa
tang xa » trang xa, tang ma, lang xa
san kho » san cho, lan kho, san ho
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh

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 van) or (lieu va)) cao duc van than dinh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san kho) OR (san khoa)) tang xa hoi. ((hieu van) OR (lieu va)) cao duc van than dinh cau tren*.