Perhaps you should try some spelling variations:
hieu kenh » hieu kinh, hieu kem, hieu binh
dung tren » dung trong, dung trung
thanh hai » thanh phan, thanh hoa, thanh san
kenh phan » benh nhan, benh phau, ke phan
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hang ma » hang ca, tang ma, nang ma
cuu tre » cua tre, cau tren, cau treo

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 ty ((hang ma) or (hang va)) hoi. hieu kenh phan tu va thanh hai ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((hang ma) OR (hang va)) hoi. hieu kenh phan tu va thanh hai ((dung tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ty ((hang ma) or (hang va)) hoi. hieu kenh phan tu va thanh hai ((dung tren) or (cuu tre))*.