Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh co » thanh do, thanh ca, thanh ho
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve tai » te tai, de tai, ve tac
le tai » le thi, ly tai, te tai
va cam » va cham, va cac, va cao
co cua » con cua, ca cua, cong cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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