Perhaps you should try some spelling variations:
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
va thanh » gia thanh, ban thanh, le thanh
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach thu) OR (sach tham)) nang x hoi. hieu ve cam xuc ((va thanh) or (va tinh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach tham)) nang x hoi. hieu ve cam xuc ((va thanh) OR (va tinh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) OR (sach tham)) nang x hoi. hieu ve cam xuc ((va thanh) or (va tinh)) vi cua tre*".