Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
qua ban » cua ban, qua quan
vai cua » dai cua, hai cua, lai cua
cao hoa » cao hoat, cao khoa, cau hoa
su sach » so sach, vu sach
van ca » van cau, van cua, dan ca
ca qua » cau qua, cac qua, ca quan

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 (su sach)) ky nang cao hoa. hieu van ca qua ban thanh ((vai cuu) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang cao hoa. hieu van ca qua ban thanh ((vai cuu) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang cao hoa. hieu van ca qua ban thanh ((vai cuu) or (vai cua)) tre*.