Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cua triet » cua viet, su triet, va triet
sang ma » nang ma, sang tao, mang may
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
luc va » duc va, tuc va, loc va
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach y ((sang ma) or (tang ma)) hoi. hieu ve cau luc va ((hanh di) OR (hanh de)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach y ((sang ma) OR (tang ma)) hoi. hieu ve cau luc va ((hanh di) OR (hanh de)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach y ((sang ma) or (tang ma)) hoi. hieu ve cau luc va ((hanh di) OR (hanh de)) cua triet".
• Adding a wildcard symbol may retrieve word variants: nuoc sach y ((sang ma) or (tang ma)) hoi. hieu ve cau luc va ((hanh di) OR (hanh de)) cua triet*.