Perhaps you should try some spelling variations:
sang tao » hang tai
xa hanh » xa thanh, xa khanh, va hanh
cao tuc » dao tuc, cao duc, cao suc
su sach » so sach, vu sach
sang ma » tang ma, nang ma, mang may
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao
dai va » mai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((sang ma) OR (sang tao)) hoi. hieu va cao tuc xa hanh ((dai va) or (hoi va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((sang ma) OR (sang tao)) hoi. hieu va cao tuc xa hanh ((dai va) OR (hoi va)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((sang ma) OR (sang tao)) hoi. hieu va cao tuc xa hanh ((dai va) or (hoi va)) triet*".