Perhaps you should try some spelling variations:
vu sach » vu bach, vu khach
su sach » so sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
va tinh » may tinh
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua
co cua » con cua, ca cua, cong cua

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) or (su sach)) ky nang xa hoi. hieu va cac tuc va tinh ((va cua) or (co cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang xa hoi. hieu va cac tuc va tinh ((va cua) OR (co cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang xa hoi. hieu va cac tuc va tinh ((va cua) or (co cua)) tre*.