Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
vu sach » vu bach, su sach, vu khach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
ve cam » ve cham, ve cac, va cam
vi ve » va ve, gi ve, ve ve

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) or (((vu sach) or (vay khach)))) ky nang xa hoi. hieu ve cam xuc van hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (((vu sach) OR (vay khach)))) ky nang xa hoi. hieu ve cam xuc van hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (((vu sach) or (vay khach)))) ky nang xa hoi. hieu ve cam xuc van hanh vi ve triet*.