Perhaps you should try some spelling variations:
nhien cac » hien cac, thien cac, vien cac
cua viet » hoa viet, cua vat, cua dieu
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
cac bao » cach bao, cac bai, cac ban
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, su sach, vu khach
ca viet » va viet, co viet, hoa viet
bao va » bao ve, tao va, ban va

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 (vu sach)) ky nang xa hoi. thien nhien cac bao va hanh vai ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang xa hoi. thien nhien cac bao va hanh vai ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu sach)) ky nang xa hoi. thien nhien cac bao va hanh vai ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang xa hoi. thien nhien cac bao va hanh vai ((cua viet) OR (ca viet))*.