Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
sach thi » sach thu, sach tai, sach tham
hanh tri » thanh tri, hanh tai, hanh trinh
va triet » va thiet, va trien, ve triet
hieu va » lieu va, hieu qua
va cham » va chat, va tham
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ca hoi » cau hoi, cua hoi, co hoi

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 thi) OR (sach thieu)) hang ((ca hoi) or (xa hoi)). hieu va cham thuc va hanh tri va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thieu)) hang ((ca hoi) OR (xa hoi)). hieu va cham thuc va hanh tri va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thi) OR (sach thieu)) hang ((ca hoi) or (xa hoi)). hieu va cham thuc va hanh tri va triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) OR (sach thieu)) hang ((ca hoi) or (xa hoi)). hieu va cham thuc va hanh tri va triet*.