Perhaps you should try some spelling variations:
hanh cact » hanh cat, hang cac, hanh cad
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
ve triet » va trien, su triet
hanh cac » hang cac, hanh cat, hanh cham
cac tuc » cac tu, cac tac, cac nuoc
cac toc » cac toi, cac nuoc, cac thoi
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
vai ve » va ve, dai ve, vai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thu ((hanh cac) or (hanh cact)) hoi. hieu va ((cac tuc) or (cac toc)) va hanh vai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu ((hanh cac) OR (hanh cact)) hoi. hieu va ((cac tuc) OR (cac toc)) va hanh vai ve triet.
• Adding a wildcard symbol may retrieve word variants: toc sach thu ((hanh cac) or (hanh cact)) hoi. hieu va ((cac tuc) or (cac toc)) va hanh vai ve triet*.