Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
may nang » may nong, ky nang, cam nang
hanh sua » hinh su, hanh va, hanh tu
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
su sach » so sach, vu sach
va nang » van nang, da nang, cam nang
sua va » suat va, vua va, xua va
ve cam » ve cac, va cam, ve cai
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 ((may nang) or (va nang)) x hoi. hieu ((ve cam) OR (ve cham)) duc va hanh sua va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((may nang) OR (va nang)) x hoi. hieu ((ve cam) OR (ve cham)) duc va hanh sua va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((may nang) or (va nang)) x hoi. hieu ((ve cam) OR (ve cham)) duc va hanh sua va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((may nang) or (va nang)) x hoi. hieu ((ve cam) OR (ve cham)) duc va hanh sua va triet*.