Perhaps you should try some spelling variations:
thanh vac » thanh van, thanh bac, thanh cac
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
sach ty » sach y, sach tu, sach thu
va cao » va cac, va co, va dao
ve cai » va cai, ve cac, ve tai
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 ty nang x hoi. hieu ((ve cai) or (va cao)) duc va ((thanh va) or (thanh vac)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((ve cai) OR (va cao)) duc va ((thanh va) OR (thanh vac)) cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cai) or (va cao)) duc va ((thanh va) or (thanh vac)) cua te*.