Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dang xay » dang van, van xay
nang xa » nang x, lang xa, nang ma
mang xa » lang xa, mang may, mang cua
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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: toc sach y ((((nang xa) or (mang xa))) or (dang xay)) hoi. hieu ve cam duc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((((nang xa) OR (mang xa))) OR (dang xay)) hoi. hieu ve cam duc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach y ((((nang xa) or (mang xa))) or (dang xay)) hoi. hieu ve cam duc va hanh vi cua te*.