Perhaps you should try some spelling variations:
khoa tang » kho tang, khoa dang, khoa tieng
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
duc manh » suc manh, duc anh, duc minh
san khoa » toan khoa, hang khoa, da khoa
duc van » duc va, duc tan, duc phan
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va
tang xa » trang xa, tang ma, lang xa
vi cuu » vi luu, vinh cuu
tu san » thu san, tu ban, tu can

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