Perhaps you should try some spelling variations:
qua hac » qua hai, qua cac, qua hoat
hac tuc » thac toc, thai tuc
va danh » va dinh, va hanh, dia danh
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua
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: tu sac ky nang x hoi. hieu qua hac tuc ((va danh) or (va dan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. hieu qua hac tuc ((va danh) OR (va dan)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. hieu qua hac tuc ((va danh) or (va dan)) vi cua tre*.