Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
danh sai » dung sai, danh bat, danh dau
chat doc » chat hoc, chau doc, thuat doc
chat soc » cham soc, chat hoc, chat song
thu sach » tu sach, thuat sach, thuoc sach
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua
tu sac » tu sach, tu cac, tu san

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

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