Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang ma » tang ma, sang ma, nang cao
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: ((vu bach) or (toc sach)) ky nang ma hoi. hieu vu cham tuc ((van hanh) or (va danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (toc sach)) ky nang ma hoi. hieu vu cham tuc ((van hanh) OR (va danh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (toc sach)) ky nang ma hoi. hieu vu cham tuc ((van hanh) or (va danh)) vi cua tre*.