Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
lang mai » lang dai, lang hai, lang man
cau luc » cau truc, cau phuc
cam luc » cam xuc
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
sach uu » sach luu, sach tu, sach xu
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach uu)) lang mai hoi. hieu ve ((cam luc) or (cau luc)) gia thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach uu)) lang mai hoi. hieu ve ((cam luc) OR (cau luc)) gia thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach uu)) lang mai hoi. hieu ve ((cam luc) or (cau luc)) gia thanh dai cua tre*.