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
cua tre » cuu tre, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, mang cua
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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 di ((cua tre) OR (cua te))~.
• 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 di ((cua tre) OR (cua te))*.
• 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 di ((cua tre) OR (cua te))*".