Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh ca » thanh cha, thanh cac, thanh ha
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ly nang
ty hang » ly hang, ty xang, thi hang
va cam » va cham, va cac, va cao
ca cua » co cua
ve cai » va cai, ve cac, ve tai
cua tu » cua tuc, cua su, cua cu

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