Perhaps you should try some spelling variations:
thanh moi » thanh loi, thanh hoa, thanh hai
thanh doi » thanh loi, thanh do, thanh hoai
su triet » su viet, su tien, ve triet
sach ty » sach y, sach tu, sach thu
cac tuc » cac toc, cac tu, cac tac
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang ha » long ha
tuc va » thuc va, truc va, tuc xa
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 ty ((nang x) or (lang ha)) hoi. hieu ve cac tuc va ((thanh doi) OR (thanh moi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang x) OR (lang ha)) hoi. hieu ve cac tuc va ((thanh doi) OR (thanh moi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang x) or (lang ha)) hoi. hieu ve cac tuc va ((thanh doi) OR (thanh moi)) su triet*".