Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
toc sach » hoc sach, doc sach, thuoc sach
thu hanh » thuc hanh, thu thanh, thuy hanh
van hanh » ban hanh, van anh, van ban
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
hanh xa » hanh va, hanh ma, hanh xu
lam va » nam va, dam va, lam ha
ve cam » ve cham, ve cac, va cam

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

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