Perhaps you should try some spelling variations:
ban hanh » ban hang
so sach » so sanh, bo sach, co sach
tuc ban » thuc ban, truc ban, tu ban
hoi cua » hoi chuc
doi cua » dai cua
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang ((ma hoi) OR (ma hoa)). hieu ve cam tuc ban hanh ((doi cua) or (hoi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang ((ma hoi) OR (ma hoa)). hieu ve cam tuc ban hanh ((doi cua) OR (hoi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang ((ma hoi) OR (ma hoa)). hieu ve cam tuc ban hanh ((doi cua) or (hoi cua)) te".
• Adding a wildcard symbol may retrieve word variants: so sach y nang ((ma hoi) OR (ma hoa)). hieu ve cam tuc ban hanh ((doi cua) or (hoi cua)) te*.