Perhaps you should try some spelling variations:
doan dieu » nhan dieu, dang dieu, toan dien
doan dau » phan dau, doan va, van dau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va kham » va cham, va khao, va tham
ve kham » vu kham, ve cham, ve khai
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ma hoi. hieu ((ve kham) OR (va kham)) nuoc va ((doan dau) or (doan dieu)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((ve kham) OR (va kham)) nuoc va ((doan dau) OR (doan dieu)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ((ve kham) OR (va kham)) nuoc va ((doan dau) or (doan dieu)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((ve kham) OR (va kham)) nuoc va ((doan dau) or (doan dieu)) cua tre*.