Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
thuat sach » thuat lanh, thuat san
duc manh » suc manh, duc anh, duc minh
thanh vi » hanh vi, thanh va, thanh ve
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
va cam » va cac, va cao, va cai
vi cua » vai cua, di cua
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang ((x hoi) OR (xa hoi)). lieu ((va cam) or (va cham)) duc manh thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang ((x hoi) OR (xa hoi)). lieu ((va cam) OR (va cham)) duc manh thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang ((x hoi) OR (xa hoi)). lieu ((va cam) or (va cham)) duc manh thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang ((x hoi) OR (xa hoi)). lieu ((va cam) or (va cham)) duc manh thanh vi cua te*.