Perhaps you should try some spelling variations:
da thanh » dao thanh, dat thanh, dam thanh
thanh vi » hanh vi, thanh va, thanh ve
su triet » su viet, su tien, ve triet
su sach » so sach
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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) or (vu sach)) ky nang x hoi. hieu ve cac tac da thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang x hoi. hieu ve cac tac da thanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. hieu ve cac tac da thanh vi su triet*.