Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua quoc » cua nuoc, cua thuoc
thanh va » thanh van, hanh va, thanh ha
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
va cua » va chua, via cua, ca cua
ma hoi » mai hoi, xa hoi, ma hoa

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 (so sach))) or (thu hoach)) y nang ma hoi. hieu va cam xuc van thanh va cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (so sach))) OR (thu hoach)) y nang ma hoi. hieu va cam xuc van thanh va cua quoc.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (so sach))) or (thu hoach)) y nang ma hoi. hieu va cam xuc van thanh va cua quoc*.