Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
hang cao » hoang cao, nang cao, hang ca
vai cua » dai cua, hai cua, lai cua
hien tu » khien tu, dien tu
hieu tu » chieu tu, hieu tuc, lieu tu
cao hoi » cau hoi, co hoi, cao hoc
ty hang » ly hang, ty xang, thi hang
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
cam lo » nam lo, cam ly, cam o
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (tu sach)) ty hang cao hoi. ((hieu tu) or (hien tu)) cam lo va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ty hang cao hoi. ((hieu tu) OR (hien tu)) cam lo va thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ty hang cao hoi. ((hieu tu) or (hien tu)) cam lo va thanh vai cua tre*.