Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
va thanh » gia thanh, ban thanh, va tinh
vang cua » mang cua, hang cua, tang cua
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
van cua » ban cua, dan cua, nan cua
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
x hoi » xa hoi, o hoi, x ho
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach tu nang ((x hoi) or (o hoc)). hieu va cam tu va thanh ((van cua) OR (vang cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach tu nang ((x hoi) OR (o hoc)). hieu va cam tu va thanh ((van cua) OR (vang cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach tu nang ((x hoi) or (o hoc)). hieu va cam tu va thanh ((van cua) OR (vang cua)) triet*".