Perhaps you should try some spelling variations:
thuoc sai » thuoc tai, thuoc san, thuoc sach
va triet » va thiet, va trien, ve triet
de cuac » de cac
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
toc sai » toc san, toc dai, toc thai
nang xa » nang x, lang xa, nang ma
dao va » dao van, tao va, do va
de cua » le cua, te cua, dieu cua
di va » dai va, di vao, doi va

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

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