Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh van » thanh san, thanh toan, thanh phan
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
va cam » va cham, va cac, va cao
xuc va » tuc va, luc va, xac va
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

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 ly nang ((x hoi) or (xa hoi)). hieu va cam ((xuc va) or (duc va)) thanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang ((x hoi) OR (xa hoi)). hieu va cam ((xuc va) OR (duc va)) thanh van cua te.
• Adding a wildcard symbol may retrieve word variants: thuat sach ly nang ((x hoi) or (xa hoi)). hieu va cam ((xuc va) or (duc va)) thanh van cua te*.