Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cam truc » cau truc, nam truc, lam truoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
mang xa » lang xa, mang may, mang cua
di cua » dai cua, doi cua, de cua
ve cam » ve cham, ve cac, va cam

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 ((mang xa) or (dang xay)) hoi. hieu ve cam truc ((va hanh) OR (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((mang xa) OR (dang xay)) hoi. hieu ve cam truc ((va hanh) OR (va danh)) di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((mang xa) or (dang xay)) hoi. hieu ve cam truc ((va hanh) OR (va danh)) di cua tre*".