Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
ty nang » ky nang, ty xang, ty hang
va chai » va cai, va chat, va chi
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua
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: vu sach ty nang x hoi. lieu ((va chai) or (va cham)) cuc ((va thanh) OR (gia thanh)) ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. lieu ((va chai) OR (va cham)) cuc ((va thanh) OR (gia thanh)) ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang x hoi. lieu ((va chai) or (va cham)) cuc ((va thanh) OR (gia thanh)) ve cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x hoi. lieu ((va chai) or (va cham)) cuc ((va thanh) OR (gia thanh)) ve cua tre*.