Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
hanh hai » nhanh hai, hang hai, hanh tai
thu sac » thu san, thu xac, thu dac
cac lao » ca lao, cac loai, cac giao
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lao va » tao va, cao va, bao va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) or (thu sach)) ky nang x hoi. hieu va cac lao va ((hanh hai) OR (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu sach)) ky nang x hoi. hieu va cac lao va ((hanh hai) OR (thanh hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu sach)) ky nang x hoi. hieu va cac lao va ((hanh hai) OR (thanh hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) or (thu sach)) ky nang x hoi. hieu va cac lao va ((hanh hai) OR (thanh hai)) cua tre*.