Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
ve tham » va tham, ve cham, vi tham
tu cach » tu cac
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky tang ma hoi. hieu ve tham thuc va danh ((vi cua) or (lai chau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky tang ma hoi. hieu ve tham thuc va danh ((vi cua) OR (lai chau)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky tang ma hoi. hieu ve tham thuc va danh ((vi cua) or (lai chau)) tre*.