Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
doc sach » hoc sach, toc sach, nuoc sach
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
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: ((su sach) or (doc sach)) ky nang ma hoi. hieu ve pham thuc ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (doc sach)) ky nang ma hoi. hieu ve pham thuc ban hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (doc sach)) ky nang ma hoi. hieu ve pham thuc ban hanh vi cua tre*.