Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va hanh, dia danh
cac xuc » cam xuc, cac nuoc, chat xuc
qua cac » cua cac
cau hoa » cau hoi
sai ky » sac ky
va dan » ca dan, va dao, va dau
ca cua » co cua
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang cau hoa. hieu qua cac xuc ((((va danh) or (va dan))) or (ban hanh)) ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang cau hoa. hieu qua cac xuc ((((va danh) OR (va dan))) OR (ban hanh)) ca cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang cau hoa. hieu qua cac xuc ((((va danh) or (va dan))) or (ban hanh)) ca cua tre*.