Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
sach thu » sach thue, sach tham, cach thuc
va thanh » gia thanh, ban thanh, va tinh
lap cua » lai cua, tap cua, lam cua
cao duc » dao duc, cao suc, giao duc
cua tre » cua te, cuu tre, cua triet
cam duc » cam xuc, pham duc, nam duoc
hieu va » lieu va, hieu qua
cao loi » co loi, cao tuoi, ngao loi

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 thieu)) nang cao loi. hieu va ((cam duc) OR (cao duc)) va thanh lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach thu) OR (sach thieu)) nang cao loi. hieu va ((cam duc) OR (cao duc)) va thanh lap cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach thu) or (sach thieu)) nang cao loi. hieu va ((cam duc) OR (cao duc)) va thanh lap cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach thu) or (sach thieu)) nang cao loi. hieu va ((cam duc) OR (cao duc)) va thanh lap cua tre*.