Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cao suc » cao su, cao duc
tue cua » te cua
suc van » su van, duc van, luc van
hieu ve » hieu va
y nang » ky nang, ly nang, v nang
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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: thuat sach y nang x hoi. ((hieu ve) OR (hieu van)) cao suc van hanh ((le cua) OR (tue cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang x hoi. ((hieu ve) OR (hieu van)) cao suc van hanh ((le cua) or (tue cua)) te~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang x hoi. ((hieu ve) OR (hieu van)) cao suc van hanh ((le cua) or (tue cua)) te*.