Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
sach thi » sach thu, sach tai, sach thieu
va triet » va thiet, va trien, ve triet
hang doi » hang di, hang loi, huong doi
van hang » van khang, van hoang, van thang
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thi ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc van hang doi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thi ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc van hang doi ((va triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thi ((nang xa) OR (nang ma)) hoi. hieu ve cam tuc van hang doi ((va triet) or (su triet))*".