Perhaps you should try some spelling variations:
su sach » so sach, vu sach
via cua » gia cua, gian cua, giau cua
va tinh » may tinh
coc tuc » coc luc, hoc thuc, doc thuc
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
tuc va » thuc va, truc va, tuc xa
va cua » va chua, ca cua, ma cua
ve coc » ve cuoc, ve cac, ve co

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 ((ky lang) or (ky tang)) xa hoi. hieu ve coc tuc va tinh ((va cua) OR (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) xa hoi. hieu ve coc tuc va tinh ((va cua) OR (via cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) or (ky tang)) xa hoi. hieu ve coc tuc va tinh ((va cua) OR (via cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) or (ky tang)) xa hoi. hieu ve coc tuc va tinh ((va cua) OR (via cua)) tre*.