Perhaps you should try some spelling variations:
thanh ca » thanh cha, thanh cac, thanh ha
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
va cham » va chat, va tham
duc gia » quoc gia
va cai » va cac, va bai, va dai
ca cua » co cua
cua te » cua tu

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 ((ty nang) OR (ky nang)) x ho. hieu ((va cai) or (va cham)) duc gia thanh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) x ho. hieu ((va cai) OR (va cham)) duc gia thanh ca cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ky nang)) x ho. hieu ((va cai) or (va cham)) duc gia thanh ca cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ky nang)) x ho. hieu ((va cai) or (va cham)) duc gia thanh ca cua te*.