Perhaps you should try some spelling variations:
thanh cac » hanh cac, thanh bac, tranh cac
thanh ca » thanh cha, thanh ha, thanh va
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 cam » va cham, va cac, va cao
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 cam)) duc va ((thanh ca) OR (thanh cac)) 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 cam)) duc va ((thanh ca) OR (thanh cac)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu ((ve cai) or (va cam)) duc va ((thanh ca) OR (thanh cac)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((ve cai) or (va cam)) duc va ((thanh ca) OR (thanh cac)) cua te*.