Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
nang lai » nang tai, mang lai, nang cai
tu sach » thu sach, te sach, tu cach
cau luc » cau truc, cau phuc
cam luc » cam xuc
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
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) OR (su sach)) ty nang lai 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) OR (su sach)) ty nang lai hoi. hieu ve ((cam luc) OR (cau luc)) gia thanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang lai hoi. hieu ve ((cam luc) or (cau luc)) gia thanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang lai hoi. hieu ve ((cam luc) or (cau luc)) gia thanh dai cua tre*.