Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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) or (toc sach)) ly nang ma hoi. hieu ve cam xuc van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ly nang ma hoi. hieu ve cam xuc van hanh vi cua tu*.