Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
vat danh » va danh, van danh, luat danh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
danh vi » hanh vi, dinh vi, danh di
cuu tre » cua tre, cau tren, cau treo
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 sach ky ((nang x) or (tang ma)) hoi. hieu va tham thuc vat danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang x) OR (tang ma)) hoi. hieu va tham thuc vat danh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang x) or (tang ma)) hoi. hieu va tham thuc vat danh vi cuu tre*.