Perhaps you should try some spelling variations:
toan thanh » tran thanh, hoan thanh, toan thang
toan hanh » toan anh, tran hanh, toan doanh
thu sach » tu sach, thuat sach, thuoc sach
te sach » toc sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ky sang ma hoi. hieu ve cam duc ((toan hanh) or (toan thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky sang ma hoi. hieu ve cam duc ((toan hanh) OR (toan thanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky sang ma hoi. hieu ve cam duc ((toan hanh) or (toan thanh)) vi cua tre*.