Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
phan cua » nhan cua, than cua, phat cua
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
cam loc » cam lo
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va
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: ((toc sach) or (co sach)) ky nang ((x hoi) OR (xa hoi)). hieu ve cam loc va thanh phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (co sach)) ky nang ((x hoi) OR (xa hoi)). hieu ve cam loc va thanh phan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (co sach)) ky nang ((x hoi) OR (xa hoi)). hieu ve cam loc va thanh phan cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (co sach)) ky nang ((x hoi) OR (xa hoi)). hieu ve cam loc va thanh phan cua tre*.