Perhaps you should try some spelling variations:
hang cao » hoang cao, nang cao, hang ca
vu sach » vu bach, su sach, vu khach
ty hang » ly hang, ty xang, thi hang
cao hoi » cau hoi, co hoi, cao hoc
hieu le » hieu ly, tieu le, hieu luc
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
hieu he » hiem he, hieu hien, hieu kem
ma thu » va thu
thu va » thuc va, thue va, tu va
vi cua » vai cua, di cua

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 ty hang cao hoi. ((((hieu le) or (hieu ve))) or (hieu he)) ma thu va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty hang cao hoi. ((((hieu le) OR (hieu ve))) OR (hieu he)) ma thu va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: vu sach ty hang cao hoi. ((((hieu le) or (hieu ve))) or (hieu he)) ma thu va hanh vi cua vat*.