Perhaps you should try some spelling variations:
hang cua » mang cua, hang ca, huong cua
vu sach » vu bach, su sach, vu khach
ve cham » va cham, ve chat, vu cham
va hang » van hang, va nang, va lang
luc va » duc va, tuc va, loc va
ve cam » ve cac, va cam, ve cai
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
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: vu sach ((y nang) or (v nang)) xa hoi. hieu ((ve cam) OR (ve cham)) luc va hang cua va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y nang) OR (v nang)) xa hoi. hieu ((ve cam) OR (ve cham)) luc va hang cua va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((y nang) or (v nang)) xa hoi. hieu ((ve cam) OR (ve cham)) luc va hang cua va thiet".
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) or (v nang)) xa hoi. hieu ((ve cam) OR (ve cham)) luc va hang cua va thiet*.