Perhaps you should try some spelling variations:
kinh thuc » sinh thuc, dinh thuc, hinh thuc
mang xa » lang xa, mang may, dang xay
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va kinh » va tinh, qua kinh
thuc va » thuc vat, thuc dan, thuc day
kinh vi » dinh vi, kinh ve, kenh vi
cuu tre » cua tre, cau tren, cau treo
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((mang xa) or (nang ma)) hoi. hieu va kinh thuc va kinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((mang xa) OR (nang ma)) hoi. hieu va kinh thuc va kinh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((mang xa) or (nang ma)) hoi. hieu va kinh thuc va kinh vi cuu tre*.