Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
ca viet » va viet, co viet, hoa viet
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu qua cac xuc ((van thanh) OR (ban thanh)) ve ((ca viet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu qua cac xuc ((van thanh) OR (ban thanh)) ve ((ca viet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu qua cac xuc ((van thanh) OR (ban thanh)) ve ((ca viet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu qua cac xuc ((van thanh) OR (ban thanh)) ve ((ca viet) or (su viet))*.