Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
y nang » ky nang, ly nang, v nang
va cam » va cac, va cao, va cai

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