Perhaps you should try some spelling variations:
cua viet » hoa viet, cua vat, cua dieu
ca viet » va viet, co viet, hoa viet
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay

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

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