Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
cua triet » su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
ca xuc » chat xuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky nang xa hoi. thieu bien ((ca xuc) OR (cam xuc)) va hanh va ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang xa hoi. thieu bien ((ca xuc) OR (cam xuc)) va hanh va ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang xa hoi. thieu bien ((ca xuc) OR (cam xuc)) va hanh va ((cua triet) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang xa hoi. thieu bien ((ca xuc) OR (cam xuc)) va hanh va ((cua triet) or (cua viet))*.