Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tru nang » tra nang, truc nano, thi nang
tri nang » thi nang, tra nang, tri bang
danh va » doanh va, hanh va, anh va
hao duc » dao duc, ho duc, cao duc
tu sach » thu sach, su sach, te sach
van hao » van dao, van ha, van bao
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: tu sach ((tru nang) OR (tri nang)) x hoi. hieu van hao duc va ((danh va) or (hang va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tru nang) OR (tri nang)) x hoi. hieu van hao duc va ((danh va) OR (hang va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tru nang) OR (tri nang)) x hoi. hieu van hao duc va ((danh va) or (hang va)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tru nang) OR (tri nang)) x hoi. hieu van hao duc va ((danh va) or (hang va)) cua te*.