Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
van anh » tuan anh, van minh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cac lop » cac hop, cac loai
va cua » va chua, via cua, ca cua
cua te » cua tu
cac lo » cac co, cac bo, cac ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ve ((cac lo) or (cac lop)) ((van anh) OR (van thanh)) va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ve ((cac lo) OR (cac lop)) ((van anh) OR (van thanh)) va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ve ((cac lo) or (cac lop)) ((van anh) OR (van thanh)) va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve ((cac lo) or (cac lop)) ((van anh) OR (van thanh)) va cua te*.