Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thuc day » thuc dan, thuc vat
su triet » su viet, su tien, ve triet
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
thuc va » thuc vat, thuc dan
nang xa » nang x, nang ma, mang xa
vu sach » vu bach, su sach, vu khach
hai su » hai vu, lai su, hai so

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve tham ((thuc va) or (thuc day)) thanh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve tham ((thuc va) OR (thuc day)) thanh hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve tham ((thuc va) or (thuc day)) thanh hai su triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y ((nang xa) OR (lang xa)) hoi. hieu ve tham ((thuc va) or (thuc day)) thanh hai su triet*.