Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
van chat » cao chat
hieu van » hieu va, thien van, lieu va
chat soc » cham soc, chat hoc, chat doc
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va hanh, dia danh
dau cua » dai cua, day cua, cau cua
tu sach » thu sach, su sach, te sach
va dan » ca dan, va dao, va dau

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