Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » thuat sach, thuoc sach, thu hoach
thanh ki » thanh kim, thanh ky, thanh ke
xuc van » duc van, luc van, vuc van
su tien » su kien, su hien, tu tieng
uu nang » cuu nang, vu nang, cuu nong
nang ma » tang ma, sang ma, nang cao
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) uu nang ma hoi. hieu ((va cam) or (va cao)) xuc van thanh ki su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) uu nang ma hoi. hieu ((va cam) OR (va cao)) xuc van thanh ki su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) uu nang ma hoi. hieu ((va cam) or (va cao)) xuc van thanh ki su tien".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) uu nang ma hoi. hieu ((va cam) or (va cao)) xuc van thanh ki su tien*.