Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
quoc ban » quoc bao, quoc lan, quoc quan
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
luc loi » luc moi, luc doi, truc loi
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, xuat ban
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang ((luc loi) OR (duc loi)). hieu ve cam ((xuc ban) or (quoc ban)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang ((luc loi) OR (duc loi)). hieu ve cam ((xuc ban) OR (quoc ban)) thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang ((luc loi) OR (duc loi)). hieu ve cam ((xuc ban) or (quoc ban)) thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang ((luc loi) OR (duc loi)). hieu ve cam ((xuc ban) or (quoc ban)) thanh lai cua tre*.