Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cam thuc » am thuc, nam thuc, cam thu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu ve ((cam thuc) or (nam thu)) ((va hanh) or (van thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve ((cam thuc) OR (nam thu)) ((va hanh) OR (van thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve ((cam thuc) or (nam thu)) ((va hanh) or (van thanh)) vi cua tre*.