Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
pham thuc » phap thuc, pham chuc, pham thu
hieu van » hieu va, thien van, lieu va
tam thuc » tham thuc, am thuc, nam thuc
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vi cuu » vi luu, vinh cuu
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky tang ma hoi. hieu van ((tam thuc) or (((pham thuc) or (nham thuc)))) va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky tang ma hoi. hieu van ((tam thuc) OR (((pham thuc) OR (nham thuc)))) va danh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky tang ma hoi. hieu van ((tam thuc) or (((pham thuc) or (nham thuc)))) va danh vi cuu tre*.