Perhaps you should try some spelling variations:
minh thai » sinh thai, tinh thai, hinh thai
thai cuu » thai cua, tai cuc, thi cuc
cuu tre » cua tre, cau tren, cau treo
cam duc » cam xuc, cao duc, nam duoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sang ma » tang ma, nang ma, sang tao
sac ky » cac ky, sai ky
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) OR (pham duc)) van minh 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) OR (pham duc)) van minh thai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (sang ma)) hoi. hieu va ((cam duc) OR (pham duc)) van minh thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (sang ma)) hoi. hieu va ((cam duc) OR (pham duc)) van minh thai cuu tre*.