Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
dinh vai » dinh van, dinh vi, dinh va
lang van » dang van, tang van, hoang van
vu cham » va cham, vu kham, qua cham
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
tu cham » toc cham, thi cham
tu sach » thu sach, su sach, tu cach
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
te sach » toc sach

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 (te sach)) ky lang van hoi. hieu ((vu cham) OR (tu cham)) duc va dinh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky lang van hoi. hieu ((vu cham) OR (tu cham)) duc va dinh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky lang van hoi. hieu ((vu cham) OR (tu cham)) duc va dinh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky lang van hoi. hieu ((vu cham) OR (tu cham)) duc va dinh vai cua viet*.