Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thi hanh » thi thanh
thi nang » thi cong, ki nang
hieu va » lieu va, hieu qua
danh di » danh du, xanh di, danh dien
luc va » tuc va, loc va
di cua » dai cua, doi cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((thi nang) OR (thi hanh)) x hoi. hieu va cac ((luc va) or (duc va)) danh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((thi nang) OR (thi hanh)) x hoi. hieu va cac ((luc va) OR (duc va)) danh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((thi nang) OR (thi hanh)) x hoi. hieu va cac ((luc va) or (duc va)) danh di cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((thi nang) OR (thi hanh)) x hoi. hieu va cac ((luc va) or (duc va)) danh di cua te*.