Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » nhanh hai, hang hai, hanh tai
te sach » toc sach
hieu ve » hieu va, hieu van
dao duc » giao duc, tao duoc
ve dao » de dao, va dao, ve bao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
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: te sach y nang ((ma hoi) or (ma hoa)). hieu ve dao duc va ((hanh hai) OR (thanh hai)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((ma hoi) OR (ma hoa)). hieu ve dao duc va ((hanh hai) OR (thanh hai)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((ma hoi) or (ma hoa)). hieu ve dao duc va ((hanh hai) OR (thanh hai)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((ma hoi) or (ma hoa)). hieu ve dao duc va ((hanh hai) OR (thanh hai)) cua tu*.