Perhaps you should try some spelling variations:
tang lai » trang lai, tang tai, tang loi
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va danh, ban hanh
ky tang » ky nang, ky dang, kho tang
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
cam tuc » cam xuc, cam tu, nam thuc
vi cua » vai cua, di cua
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 ky tang lai hoi. ((hieu ve) or (hieu va)) cam tuc ((va hanh) OR (va thanh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang lai hoi. ((hieu ve) OR (hieu va)) cam tuc ((va hanh) OR (va thanh)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang lai hoi. ((hieu ve) or (hieu va)) cam tuc ((va hanh) OR (va thanh)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang lai hoi. ((hieu ve) or (hieu va)) cam tuc ((va hanh) OR (va thanh)) vi cua tu*.