Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
thu sach » thuat sach, thuoc sach, thu hoach
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
ve cua » le cua, de cua, te cua
xuc va » duc va, tuc va, luc va
ve cac » va cac
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) OR (thu sach)) ty nang x hoi. hieu ((ve cac) or (vien cac)) xuc va thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cac) OR (vien cac)) xuc va thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cac) or (vien cac)) xuc va thanh ve cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cac) or (vien cac)) xuc va thanh ve cua te*.