Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, hieu ve
chat soc » cham soc, chat hoc, chat doc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
soc va » hoc va, loc va, doc va
dai ca » dai cua, dai va, doi ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang xa hoi. ((hieu van) or (lieu va)) chat soc va danh ((dai ca) OR (bai ca)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang xa hoi. ((hieu van) OR (lieu va)) chat soc va danh ((dai ca) OR (bai ca)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang xa hoi. ((hieu van) or (lieu va)) chat soc va danh ((dai ca) OR (bai ca)) viet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang xa hoi. ((hieu van) or (lieu va)) chat soc va danh ((dai ca) OR (bai ca)) viet*.