Perhaps you should try some spelling variations:
hanh vinh » thanh vinh, khanh vinh, hanh tinh
hieu van » hieu va, thien van, hieu ve
vinh cuu » dinh cuu, sinh cua, dinh cu
san khoa » toan khoa, hang khoa, da khoa
van hanh » van thanh, ban hanh, van anh
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
san kho » san cho, lan kho, san ho
tang xa » trang xa, tang ma, lang xa

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 hanh vinh cuu tre~.
• 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 hanh vinh cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san kho) OR (san khoa)) tang xa hoi. ((hieu van) or (lieu va)) cao duc van hanh vinh cuu tre*".