Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tuc van » thuc van, truc van, duc van
hang vi » hang va, hanh vi, khang voi
hang di » hang doi, hang dien, hang dich
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach 2
tuc va » thuc va, truc va, tuc xa
v nang » va nang, vu nang, van nang

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 v nang xa hoi. hieu va cac ((tuc van) OR (tuc va)) ((hang di) or (hang vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang xa hoi. hieu va cac ((tuc van) OR (tuc va)) ((hang di) OR (hang vi)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang xa hoi. hieu va cac ((tuc van) OR (tuc va)) ((hang di) or (hang vi)) su triet*".