Perhaps you should try some spelling variations:
van hang » van khang, van hoang, van thang
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
ve cham » vu cham, ve chim, viet cham
va cham » va chat, va tham
ve chat » va chat, van chat
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va va » va van, va vua, va vai
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 xa hoi. hieu ((((ve cham) OR (va cham))) or (ve chat)) duc van hang va va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ((((ve cham) OR (va cham))) OR (ve chat)) duc van hang va va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ((((ve cham) OR (va cham))) or (ve chat)) duc van hang va va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((((ve cham) OR (va cham))) or (ve chat)) duc van hang va va thiet*.