Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
lam duoc » nam duoc, luat duoc, tao duoc
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
ca cua » co cua
va cua » va chua, via cua, ma cua
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa

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 ky sang ma hoi. hieu van ((lam duoc) OR (lam thuoc)) va thanh ((va cua) or (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky sang ma hoi. hieu van ((lam duoc) OR (lam thuoc)) va thanh ((va cua) OR (ca cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky sang ma hoi. hieu van ((lam duoc) OR (lam thuoc)) va thanh ((va cua) or (ca cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu san ky sang ma hoi. hieu van ((lam duoc) OR (lam thuoc)) va thanh ((va cua) or (ca cua)) triet*.