Perhaps you should try some spelling variations:
danh kien » dinh kien, danh viet, linh kien
thuc day » thuc dan, thuc vat
kien cua » khien cua, dien cua, tien cua
doc sach » hoc sach, nuoc sach, dac sac
toc sach » hoc sach, thuoc sach, nuoc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) OR (toc sach)) ky nang x hoi. hieu va cham ((thuc va) or (thuc day)) danh kien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (toc sach)) ky nang x hoi. hieu va cham ((thuc va) OR (thuc day)) danh kien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (toc sach)) ky nang x hoi. hieu va cham ((thuc va) or (thuc day)) danh kien cua tre".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) OR (toc sach)) ky nang x hoi. hieu va cham ((thuc va) or (thuc day)) danh kien cua tre*.