Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat soc » cham soc, chat hoc, chat doc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
dau cua » dai cua, dan cua, bau cua
cau cua » cau qua, ca cua, cu cua
day cua » dai cua
soc va » hoc va, loc va, doc va

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