Perhaps you should try some spelling variations:
van chat » cao chat
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cau » van hau, toan cau, van canh
van dau » van dao, phan dau
va hanh » van hanh, va thanh, va danh
su viet » so viet
luc va » duc va, tuc va, loc va
tai su » tai so, tai tu, lai su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ((((van cau) OR (van dau))) OR (van chat)) luc va hanh tai su viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ((((van cau) OR (van dau))) or (van chat)) luc va hanh tai su viet~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ((((van cau) OR (van dau))) or (van chat)) luc va hanh tai su viet*.