Perhaps you should try some spelling variations:
tang lai » trang lai, tang tai, tang loi
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
va hanh » va thanh, va danh, ban hanh
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu van
hieu va » lieu va, hieu qua
vi cua » vai cua, di cua
sach 7 » sach y, sach 2
7 tang » 6 tang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach 7 tang lai hoi. ((hieu ve) or (hieu va)) cam xuc ((va hanh) or (van hanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach 7 tang lai hoi. ((hieu ve) OR (hieu va)) cam xuc ((va hanh) OR (van hanh)) vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach 7 tang lai hoi. ((hieu ve) or (hieu va)) cam xuc ((va hanh) or (van hanh)) vi cua tu*.