Perhaps you should try some spelling variations:
tham thuc » tam thuc, thai thuc, thach thuc
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nam thuc, nham thu
nang lai » nang tai, mang lai, nang cai
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
va danh » va dinh, va dan, va hanh
lai hoi » dai hoi, lai hoa, lai roi
danh vi » hanh vi, dinh vi, danh di
vi cuu » vi luu, vinh cuu
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 lai hoi. hieu van ((tham 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 sac ky nang lai hoi. hieu van ((tham thuc) OR (((pham thuc) OR (nham thuc)))) va danh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang lai hoi. hieu van ((tham thuc) or (((pham thuc) or (nham thuc)))) va danh vi cuu tre*.