Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » nhanh hai, hang hai, hanh tai
vu sach » vu bach, su sach, vu khach
cac dai » cac dan, cac bai, can dai
sach ty » sach y, sach tu, sach thu
cac dac » cac dan, cac bac, cac tac
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. lieu va ((cac dac) OR (cac dai)) va ((hanh hai) OR (thanh hai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang x hoi. lieu va ((cac dac) OR (cac dai)) va ((hanh hai) or (thanh hai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x hoi. lieu va ((cac dac) OR (cac dai)) va ((hanh hai) or (thanh hai)) cua tre*.