Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va trien » va truyen, va thiet, va tuyen
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
qua cam » qua cham, qua cac, qua ca
thuc va » thuc vat, thuc dan, thuc day
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: so sach ky dang xay hoi. hieu qua cam ((thuc va) or (duc va)) hanh vi va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dang xay hoi. hieu qua cam ((thuc va) OR (duc va)) hanh vi va trien.
• Adding a wildcard symbol may retrieve word variants: so sach ky dang xay hoi. hieu qua cam ((thuc va) or (duc va)) hanh vi va trien*.