Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
nam thuc » nam thuoc, am thuc, nam thu
thuc ban » thuoc ban, thuc dan, thu ban
thanh di » thanh doi, thanh de, thanh do
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
y nang » ly nang, v nang, may nang
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) or (lieu va)) nam thuc ban thanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) OR (lieu va)) nam thuc ban thanh di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) or (lieu va)) nam thuc ban thanh di cua tu".
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) or (lieu va)) nam thuc ban thanh di cua tu*.