Perhaps you should try some spelling variations:
khanh van » thanh van, khanh vinh, hanh va
cua viet » hoa viet, cua vat, cua dieu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
han tai » hang tai, nhan tai, van tai
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
he nam » ha nam, nghe nam
nam tu » nam thu, nam thuc

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 y nang xa hoi. hieu he nam tu va ((khanh van) or (han tai)) ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu he nam tu va ((khanh van) OR (han tai)) ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu he nam tu va ((khanh van) or (han tai)) ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu he nam tu va ((khanh van) or (han tai)) ((cua viet) OR (ca viet))*.