Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
qua nam » quan nam, cua nam, quang nam
nam duc » nam duoc, pham duc, nam thuc
va hanh » van hanh, va thanh, va danh
ca viet » va viet, co viet, hoa viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach ty)) nang xa hoi. hieu qua nam duc va hanh vi ((cua viet) or (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang xa hoi. hieu qua nam duc va hanh vi ((cua viet) OR (ca viet)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) nang xa hoi. hieu qua nam duc va hanh vi ((cua viet) or (ca viet))*.