Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
cao duc » dao duc, cao suc, tao duoc
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
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 ty nang x hoi. hieu ve ((cao duc) or (giao duc)) va hanh sinh ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ve ((cao duc) OR (giao duc)) va hanh sinh ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ve ((cao duc) or (giao duc)) va hanh sinh ((cua tre) or (cau tren))*.