Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
nang lai » nang tai, mang lai, nang hai
va thanh » gia thanh, ban thanh, va tinh
nang cai » nang cao, nang tai, nang cap
su sach » so sach, vu sach
cam luc » cam xuc
cau luc » cau truc, cau phuc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van

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 ky ((nang lai) or (nang cai)) hoi. hieu ve ((cam luc) or (cau luc)) va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang lai) OR (nang cai)) hoi. hieu ve ((cam luc) OR (cau luc)) va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang lai) or (nang cai)) hoi. hieu ve ((cam luc) or (cau luc)) va thanh dai cua tre*.