Perhaps you should try some spelling variations:
nang cau » nang cao, nang dau, bang cau
hanh doi » thanh doi, hanh noi, hang doi
hang cau » hang dau, hang ca, nhung cau
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
sach ky » sac ky, sach y, sach ty
hieu le » hieu he, hieu ly, tieu le
na thu » nam thu, va thu, ma thu
thu va » thuc va, thue va, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((nang cau) or (hang cau)) hoi. ((hieu le) or (hieu ve)) na thu va hanh doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang cau) OR (hang cau)) hoi. ((hieu le) OR (hieu ve)) na thu va hanh doi cua vat.
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang cau) or (hang cau)) hoi. ((hieu le) or (hieu ve)) na thu va hanh doi cua vat*.