Perhaps you should try some spelling variations:
hang cua » mang cua, hang ca, huong cua
su sach » so sach, vu sach
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va hang » van hang, va lang, va hanh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
cua va » cua vat, chua va, cua van
thiet » thieu

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 ((y nang) or (va nang)) xa hoi. hieu va cam luc va hang cua va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (va nang)) xa hoi. hieu va cam luc va hang cua va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (va nang)) xa hoi. hieu va cam luc va hang cua va thiet*.