Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, ve cai

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 xa hoi. hieu ((ve cam) OR (va cam)) xuc 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 xa hoi. hieu ((ve cam) OR (va cam)) xuc ban thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang xa hoi. hieu ((ve cam) OR (va cam)) xuc ban thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang xa hoi. hieu ((ve cam) OR (va cam)) xuc ban thanh vi cua tre*.