Perhaps you should try some spelling variations:
lai cuu » lai cua, lai chau, lai cuoc
va daoh » va danh, va doanh
cao duc » dao duc, cao suc, giao duc
sach ky » sac ky, sach ty, sach kem
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
ma khoi » mai khoi, ra khoi, xa khoi
sang ma » tang ma, nang ma, sang tao
va dao » ca dao
ve cao » va cao, ve bao, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) OR (sach y)) sang ma khoi. hieu ve cao duc ((va daoh) or (va dao)) lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach y)) sang ma khoi. hieu ve cao duc ((va daoh) OR (va dao)) lai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) OR (sach y)) sang ma khoi. hieu ve cao duc ((va daoh) or (va dao)) lai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) OR (sach y)) sang ma khoi. hieu ve cao duc ((va daoh) or (va dao)) lai cuu tre*.