Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
van nang » van quang, van ban, van dong
van hanh » van thanh, ban hanh, van anh
ve triet » va trien, su triet
hieu va » lieu va, hieu qua
va cham » va chat, va tham
soc van » hoc van, oc van, sac van
x hoi » xa hoi, o hoi, x ho
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: ((((te sach) OR (toc sach))) or (hoc sach)) van nang x hoi. hieu va cham soc van hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((te sach) OR (toc sach))) OR (hoc sach)) van nang x hoi. hieu va cham soc van hanh vi ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((te sach) OR (toc sach))) or (hoc sach)) van nang x hoi. hieu va cham soc van hanh vi ve triet*".