Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
danh sai » dung sai, danh bat, danh dau
hanh vii » hanh voi, hanh va, hanh noi
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty danh » ty doanh, ty anh, ky danh
sai hoi » dai hoi, lai hoi, mai hoi
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
thuc va » thuc vat, thuc dan, thuc day
cu tren » tu tren, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty danh sai hoi. hieu ve pham thuc va ((hanh vii) or (hanh vi)) cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty danh sai hoi. hieu ve pham thuc va ((hanh vii) OR (hanh vi)) cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty danh sai hoi. hieu ve pham thuc va ((hanh vii) or (hanh vi)) cu tren*.