Perhaps you should try some spelling variations:
van tham » van thanh, van tuan, van chat
toc sach » hoc sach, doc sach, thuoc sach
cua viet » ca viet, hoa viet, cua vat
va tham » va cham, va thanh, va thuat
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang x ho. hieu ((va tham) OR (van tham)) xuc va danh vi ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang x ho. hieu ((va tham) OR (van tham)) xuc va danh vi ((cua tre) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang x ho. hieu ((va tham) OR (van tham)) xuc va danh vi ((cua tre) or (cua viet))".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang x ho. hieu ((va tham) OR (van tham)) xuc va danh vi ((cua tre) or (cua viet))*.