Perhaps you should try some spelling variations:
sach tru » sach truc, sach thu, sach tu
tru nang » tra nang, tri nang, truc nano
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cac dac » cac dan, cac dai, cac bac
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru nang xa hoi. hieu ve ((cac du) OR (cac dac)) ((va danh) OR (va hanh)) va cua tu~.
• Adding a wildcard symbol may retrieve word variants: tu sach tru nang xa hoi. hieu ve ((cac du) or (cac dac)) ((va danh) or (va hanh)) va cua tu*.