Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dia danh » dia ban, gia dinh
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
nang xa » nang x, lang xa, nang ma
van dam » van nam, van dao, van dau
va hanh » van hanh, va thanh, va danh
dam tu » nam tu, cam tu, tam tu
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (co sach)) ky nang xa hoi. hieu van dam tu ((va hanh) or (dia danh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ky nang xa hoi. hieu van dam tu ((va hanh) OR (dia danh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ky nang xa hoi. hieu van dam tu ((va hanh) or (dia danh)) ki su triet*.