Perhaps you should try some spelling variations:
thuoc sac » thuoc sach, thuoc dac, thuoc sai
hanh vai » hanh va, hanh tai, hanh van
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
luc va » tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sac ky lang xa hoi. hieu va cau ((luc va) or (duc va)) ((hanh vai) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sac ky lang xa hoi. hieu va cau ((luc va) OR (duc va)) ((hanh vai) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sac ky lang xa hoi. hieu va cau ((luc va) or (duc va)) ((hanh vai) or (hanh vi)) cua tre*.