Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
va hieu » van hieu, va dieu, va hien
tai hoi » tai khoi, dai hoi, tai hai
ty nang » ty xang, ty hang, ly nang
va cao » va cac, va co, va dao
vai va » mai va, dai va, hai va
ve cao » ve bao, ve cac, ve co

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)) tai hoi. hieu ((ve cao) or (va cao)) duc va thanh vai va hieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) tai hoi. hieu ((ve cao) OR (va cao)) duc va thanh vai va hieu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ky nang)) tai hoi. hieu ((ve cao) or (va cao)) duc va thanh vai va hieu*".