Perhaps you should try some spelling variations:
cham coc » cham soc, kham cuoc, chat co
ban hanh » ban hang
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
vu khac » vu kham, vu khanh, bui khac
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
coc ban » co ban, cac ban, hoc ban
vi cua » vai cua, di cua

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 khac)) ky lang xa hoi. hieu va cham coc ban hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu khac)) ky lang xa hoi. hieu va cham coc ban hanh vi cua viet*.