Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
dinh toi » dinh tri, dinh thi, dinh moi
hieu ve » hieu va, hieu van
tu sach » su sach, te sach, tu cach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cuc tre » duc tre, cua tre, cuu tre
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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)) ky sang ma hoi. hieu ve cam xuc va ((doanh tai) or (dinh toi)) cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky sang ma hoi. hieu ve cam xuc va ((doanh tai) OR (dinh toi)) cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky sang ma hoi. hieu ve cam xuc va ((doanh tai) or (dinh toi)) cuc tre*.