Perhaps you should try some spelling variations:
thanh hoa » thanh pho
thanh hai » thanh phan, thanh san
te sach » toc sach
cao duc » dao duc, cao suc, giao duc
qua cao » qua cac, qua ca, qua cai
mai hoi » mai khoi, dai hoi, lai hoi
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
cua tre » cua te, cuu tre, cua triet

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 ((ly nang) OR (ly vang)) mai hoi. hieu qua cao duc va ((thanh hai) or (thanh hoa)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (ly vang)) mai hoi. hieu qua cao duc va ((thanh hai) OR (thanh hoa)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) OR (ly vang)) mai hoi. hieu qua cao duc va ((thanh hai) or (thanh hoa)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) OR (ly vang)) mai hoi. hieu qua cao duc va ((thanh hai) or (thanh hoa)) cua tre*.