Perhaps you should try some spelling variations:
thanh dai » thanh tai, thanh dat, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cau luc » cau truc, cau phuc
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
cam luc » cam xuc
tai hoi » tai khoi, dai hoi, tai hai
ty nang » ky nang, ty xang, ty hang

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 tai hoi. hieu van ((cam luc) or (cau luc)) va ((thanh dai) OR (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang tai hoi. hieu van ((cam luc) OR (cau luc)) va ((thanh dai) OR (thanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang tai hoi. hieu van ((cam luc) or (cau luc)) va ((thanh dai) OR (thanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang tai hoi. hieu van ((cam luc) or (cau luc)) va ((thanh dai) OR (thanh hai)) cua tre*.