Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
van chat » cao chat
thu sach » thuat sach, thuoc sach, thu hoach
danh dau » lanh dao, hang dau, danh tu
danh dai » danh di, danh sai, vanh dai
hieu van » hieu va, thien van, lieu va
truc va » thuc va, thuc vat, trung va
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
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) OR (thu sach)) ky nang ma hoi. hieu van chat truc va ((danh dai) or (danh dau)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu van chat truc va ((danh dai) OR (danh dau)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang ma hoi. hieu van chat truc va ((danh dai) or (danh dau)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang ma hoi. hieu van chat truc va ((danh dai) or (danh dau)) cua tre*.