Perhaps you should try some spelling variations:
te sach » toc sach
hanh de » hanh ve, hanh kem
hieu ke » hieu kem, chieu ke, hieu ky
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, tu cach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
ke cau » ket cau
y nang » ky nang, ly nang, v nang
luc va » tuc va, loc va
de cua » le cua, te cua, dieu 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 (tu sach)) y nang ma hoi. hieu ke cau ((luc va) or (duc va)) hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (tu sach)) y nang ma hoi. hieu ke cau ((luc va) OR (duc va)) hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (tu sach)) y nang ma hoi. hieu ke cau ((luc va) or (duc va)) hanh de cua tre*.