Perhaps you should try some spelling variations:
tham thuc » nham thuc, tam thuc, thai thuc
pham thuc » phap thuc, pham chuc, nham thuc
nang lai » nang tai, mang lai, nang cai
hieu van » hieu va, thien van, lieu va
nham thu » nham thuc, nam thu, pham thu
lai hoi » dai hoi, lai hoa, lai roi
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
vi luu » vi lua

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 nang lai hoi. hieu van ((tham thuc) or (((pham thuc) or (nham thu)))) va hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang lai hoi. hieu van ((tham thuc) OR (((pham thuc) OR (nham thu)))) va hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang lai hoi. hieu van ((tham thuc) or (((pham thuc) or (nham thu)))) va hanh vi luu tre*.