Perhaps you should try some spelling variations:
chat soc » cham soc, chat hoc, chat doc
cua viet » ca viet, hoa viet, cua dieu
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
dan dat » dung dat, dong dat, dinh dat
soc va » hoc va, loc va, doc va
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: su sach ((ky lang) OR (ky nang)) xa hoi. hieu va chat soc va dan dat ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky nang)) xa hoi. hieu va chat soc va dan dat ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky nang)) xa hoi. hieu va chat soc va dan dat ((cua viet) OR (cua vat))*.