Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
thuc quy » thu quy, thuc que, thue quy
dinh dai » dinh dat, sinh dai, dinh dao
tu sach » thu sach, su sach, tu cach
te sach » toc sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve cach » va cach, ve cac, ve canh
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 (te sach)) ky tang xa hoi. hieu ve cach thuc quy dinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang xa hoi. hieu ve cach thuc quy dinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang xa hoi. hieu ve cach thuc quy dinh dai cua tre*.