Perhaps you should try some spelling variations:
cach thuc » anh thuc
su triet » su viet, su tien, ve triet
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
thanh vi » thanh va, thanh ve, nhanh vi
cac thu » cac thoi
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
bang x » nang x, bang _, bang 2
x hoi » xa hoi, o hoi, x ho

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 thu bang x hoi. hieu ve ((cach thuc) OR (cac thu)) vat ((thanh vi) or (hanh vi)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu bang x hoi. hieu ve ((cach thuc) OR (cac thu)) vat ((thanh vi) OR (hanh vi)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu bang x hoi. hieu ve ((cach thuc) OR (cac thu)) vat ((thanh vi) or (hanh vi)) su triet".
• Adding a wildcard symbol may retrieve word variants: su sach thu bang x hoi. hieu ve ((cach thuc) OR (cac thu)) vat ((thanh vi) or (hanh vi)) su triet*.