Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
duc ban » duc tan, duc van, dua ban
xuc ban » cuc ban, quoc ban, xuat ban
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
nang o » nang co, nang ho, nang ro
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai

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 ky) or (sac ky)) nang o hoi. hieu ve cam ((xuc ban) or (duc ban)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang o hoi. hieu ve cam ((xuc ban) OR (duc ban)) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang o hoi. hieu ve cam ((xuc ban) or (duc ban)) thanh vi cua tre*.