Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dung tren » dung trong, dung trung
va thanh » gia thanh, va tinh, le thanh
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
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 nang ma hoa. hieu ve pham duc ((va thanh) or (ban thanh)) lai ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoa. hieu ve pham duc ((va thanh) OR (ban thanh)) lai ((dung tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoa. hieu ve pham duc ((va thanh) or (ban thanh)) lai ((dung tren) or (cuu tre))*.