Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach tham » sach nha
cac thuc » cach thuc, cac thu, can thuc
hanh lai » hanh lam, hanh tai, thanh lap
sach tai » sach bai, sach dao, sach xa
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
lang xa » lang ha, dang xay, lang van
ve cac » va cac, vien cac

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 tai) OR (sach tham)) lang xa hoi. hieu ve cac thuc va hanh lai ((cua triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ve cac thuc va hanh lai ((cua triet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ve cac thuc va hanh lai ((cua triet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tai) OR (sach tham)) lang xa hoi. hieu ve cac thuc va hanh lai ((cua triet) or (cua vat))*.