Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
nang lai » nang tai, mang lai, nang cai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
lai hoi » dai hoi, lai hoa, lai roi
cam luc » cam xuc, cau luc
dat cua » dai cua, day cua, mat cua
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 nang lai hoi. hieu van ((cam luc) or (cau truc)) va thanh dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang lai hoi. hieu van ((cam luc) OR (cau truc)) va thanh dat cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang lai hoi. hieu van ((cam luc) or (cau truc)) va thanh dat cua tre*.