Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
nam duoc » nam thuoc, da duoc, dat duoc
ky sang » ky nang, ky dang, ky tang
lai cua » dai cua, hai cua, lai chau
dan lai » dan loai, dan lap, dan lat
cua tre » cua te, cuu tre, cua triet
cam duc » cao duc, pham duc, lam duoc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
va dan » ca dan, va dao, va dau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang mai hoi. hieu ve ((((cam duc) OR (nam duoc))) OR (cam xuc)) va dan lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang mai hoi. hieu ve ((((cam duc) OR (nam duoc))) or (cam xuc)) va dan lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang mai hoi. hieu ve ((((cam duc) OR (nam duoc))) or (cam xuc)) va dan lai cua tre*.