Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sang mai » sang ma, sang tai, lang mai
nam duoc » nam thuoc, da duoc, dat duoc
dao lai » dao lam, dao bai, dao hai
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
te cac » tu cac, ve cac, te cao
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky sang mai hoi. hieu ve ((nam duoc) or (cam xuc)) va dao lai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky sang mai hoi. hieu ve ((nam duoc) OR (cam xuc)) va dao lai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te cac ky sang mai hoi. hieu ve ((nam duoc) or (cam xuc)) va dao lai ((cua tre) or (su triet))*.