Perhaps you should try some spelling variations:
thai cuu » thai cua, tai cuc, thi cuc
ban hanh » ban hang
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
tu sac » tu sach, tu cac, tu san

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 xa) or (sang ma)) hoi. hieu va cam duc ((van ban) or (ban hanh)) thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (sang ma)) hoi. hieu va cam duc ((van ban) OR (ban hanh)) thai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (sang ma)) hoi. hieu va cam duc ((van ban) or (ban hanh)) thai cuu tre*.