Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
xang van » tang van, lang van, nang van
hanh tai » thanh tai, hang tai, han tai
dang van » hoang van, hang va
hanh dai » hanh dao, vanh dai, thanh dat
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
cam duc » cam xuc, cao duc, pham duc
sach ty » sach y, sach tu, sach thu
van cam » van nam, van lam, van cau

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 ty ((xang van) OR (dang van)) hoc. hieu van cam duc va ((hanh dai) or (hanh tai)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((xang van) OR (dang van)) hoc. hieu van cam duc va ((hanh dai) OR (hanh tai)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty ((xang van) OR (dang van)) hoc. hieu van cam duc va ((hanh dai) or (hanh tai)) su triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty ((xang van) OR (dang van)) hoc. hieu van cam duc va ((hanh dai) or (hanh tai)) su triet*.