Perhaps you should try some spelling variations:
cham giua » tham gia, nhat giua, cam gia
ban thanh » ban hang
cham dua » chay dua, pham duc, pham duy
ban hanh » ban hang
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 y nang ma hoa. hieu ve ((cham dua) or (cham giua)) ((ban thanh) or (ban hanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoa. hieu ve ((cham dua) OR (cham giua)) ((ban thanh) OR (ban hanh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoa. hieu ve ((cham dua) or (cham giua)) ((ban thanh) or (ban hanh)) dai cua tre*.