Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
nang cho » nang chon, ngang cho, sang cho
cac quoc » cac nuoc, cac cuoc, cao quoc
quoc ban » quoc bao, quoc lan, quoc quan
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang cho) or (nang cao)) hoc. hieu ve cac quoc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang cho) OR (nang cao)) hoc. hieu ve cac quoc ban thanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang cho) or (nang cao)) hoc. hieu ve cac quoc ban thanh tai cua tre*.