Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang hai » hoang hai, hang tai, thanh hai
thuc dan » hoc dan, thuc vat
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
hai va » hai van, thai va, hoi va
ve nam » he nam, va nam, le nam

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

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