Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cuu » thai cua, tai cuc, thi cuc
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 (nang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) van hanh thai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (nang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) van hanh thai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) or (nang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) van hanh thai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (nang ma)) hoi. hieu ve ((cam duc) OR (pham duc)) van hanh thai cuu tre*.