Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
x hoi » o hoi, x ho, 5 hoi

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

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