Perhaps you should try some spelling variations:
phan dau » phan tu, hang dau
nang ma » tang ma, sang ma, nang cao
van dau » van dao
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
di cua » dai cua, de cua, do cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ((van dau) OR (phan dau)) luc va hanh ((di cua) OR (doi cua)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu ((van dau) OR (phan dau)) luc va hanh ((di cua) or (doi cua)) viet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu ((van dau) OR (phan dau)) luc va hanh ((di cua) or (doi cua)) viet*.