Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
sang cua » mang cua, song cua, hang cua
tu sach » su sach, te sach, tu cach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
luc gia » luoc gia, duc gia, quoc gia
dan cua » dan ca, ban cua, dai cua
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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) or (thu sach)) y nang ma hoa. hieu ve cac luc gia thanh ((sang cua) or (dan cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ma hoa. hieu ve cac luc gia thanh ((sang cua) OR (dan cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang ma hoa. hieu ve cac luc gia thanh ((sang cua) or (dan cua)) triet*.