Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
su triet » su viet, su tien, ve triet
sang ma » tang ma, sang tao, mang may
duc gia » quoc gia
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
nang ma » tang ma, nang cao, mang may
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam
van su » dan su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((((nang xa) OR (nang ma))) or (sang ma)) hoi. hieu ve cam duc gia thanh van su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((((nang xa) OR (nang ma))) OR (sang ma)) hoi. hieu ve cam duc gia thanh van su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((((nang xa) OR (nang ma))) or (sang ma)) hoi. hieu ve cam duc gia thanh van su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((((nang xa) OR (nang ma))) or (sang ma)) hoi. hieu ve cam duc gia thanh van su triet*.