Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va truyen » hoa truyen, co truyen, di truyen
tham thuc » nham thuc, pham thuc, tam thuc
dang xay » dang van, van xay
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
te sach » toc sach
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ky dang xay hoi. hieu va tham thuc va danh vi va truyen~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ky dang xay hoi. hieu va tham thuc va danh vi va truyen.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ky dang xay hoi. hieu va tham thuc va danh vi va truyen*.