Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
bac dai » bach mai
dai va » mai va
va bac » van bac, va cac, va bai
di cua » dai cua, doi cua, de cua
sach v » sach va, sach y, sach 2
me hoi » le hoi
ma hoi » xa hoi, ma hoa, va hoi
v nang » va nang, vu nang, van nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang ((((ma hoi) OR (me hoi))) or (mai hoi)). lieu va bac dai va hanh di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang ((((ma hoi) OR (me hoi))) OR (mai hoi)). lieu va bac dai va hanh di cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang ((((ma hoi) OR (me hoi))) or (mai hoi)). lieu va bac dai va hanh di cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang ((((ma hoi) OR (me hoi))) or (mai hoi)). lieu va bac dai va hanh di cua vat*.