Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach thu » sach thue, sach tham, cach thuc
va triet » va thiet, va trien, ve triet
hang hai » hoang hai, hang tai, thanh hai
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
ve am » va am

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