Perhaps you should try some spelling variations:
tham thuc » pham thuc, tam thuc, thai thuc
nham thuc » nhan thuc, nham thu, pham thuc
hieu van » hieu va, thien van, lieu va
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
vi cuu » vi luu, vinh cuu
tu can » tu ban, tu cac, thu canh
ma hoi » mai hoi, xa hoi, ma hoa
can ky » van ky, dan ky, ban 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 can ky nang ma hoi. hieu van ((tham thuc) or (((nham thuc) or (nam thuc)))) va thanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ma hoi. hieu van ((tham thuc) OR (((nham thuc) OR (nam thuc)))) va thanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ma hoi. hieu van ((tham thuc) or (((nham thuc) or (nam thuc)))) va thanh vi cuu tre*.