Perhaps you should try some spelling variations:
sang tai » hang tai, sang tao, tang tai
thanh vi » hanh vi, thanh va, thanh ve
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
ky sang » ky nang, ky dang, ky tang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
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: ((tu sach) or (te sach)) ky sang tai hoi. hieu ve cam ((luc va) or (hoc va)) thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky sang tai hoi. hieu ve cam ((luc va) OR (hoc va)) thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky sang tai hoi. hieu ve cam ((luc va) or (hoc va)) thanh vi cua tre*.