Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
chat soc » cham soc, chat hoc, chat doc
van dinh » van minh, van dich, xuan dinh
cua viet » ca viet, hoa viet, cua vat
tu sach » su sach, te sach, tu cach
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
va chat » van chat, va phat, cao chat
va dinh » va kinh, va tinh, vu dinh

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 (thu sach)) tu nang xa hoi. lieu va chat soc ((va dinh) OR (van dinh)) dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tu nang xa hoi. lieu va chat soc ((va dinh) OR (van dinh)) dai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) tu nang xa hoi. lieu va chat soc ((va dinh) OR (van dinh)) dai cua viet*".