Perhaps you should try some spelling variations:
nhien cac » hien cac, thien cac, vien cac
hanh tai » thanh tai, hang tai, han tai
su triet » su viet, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
xuc va » duc va, tuc va, luc va
thiet » thieu

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. thien nhien cac xuc va hanh tai ((((su triet) or (su tien))) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. thien nhien cac xuc va hanh tai ((((su triet) OR (su tien))) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. thien nhien cac xuc va hanh tai ((((su triet) or (su tien))) or (va thiet))*.