Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
dang xay » dang van, van xay
toc sach » hoc sach, doc sach, thuoc sach
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
vu sach » vu bach, su sach, vu khach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (toc sach)) ky dang xay hoi. hieu ve pham thuc day hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (toc sach)) ky dang xay hoi. hieu ve pham thuc day hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (toc sach)) ky dang xay hoi. hieu ve pham thuc day hanh vi cua tre*.