Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
qua cac » cua cac
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
y lang » _ lang, tay lang, yen lang
o lang » hoa lang, hoi lang
vi cua » vai cua, di cua
du va » dau va, tu va, su va

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 lang) or (o lang)) xa hoi. hieu qua cac du va danh ((vi cua) or (lai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y lang) OR (o lang)) xa hoi. hieu qua cac du va danh ((vi cua) OR (lai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((y lang) or (o lang)) xa hoi. hieu qua cac du va danh ((vi cua) or (lai cua)) triet*.