Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
danh dau » lanh dao, hang dau, danh tu
danh sai » dung sai, danh bat, hanh san
hieu van » hieu va, thien van, lieu va
van chat » cao chat
tu sach » thu sach, su sach, te sach
truc va » thuc va, thuc vat, trung va
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu van chat truc va ((danh sai) or (danh dau)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu van chat truc va ((danh sai) OR (danh dau)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu van chat truc va ((danh sai) or (danh dau)) cua tre*.