Perhaps you should try some spelling variations:
sang mai » sang ma, sang tai, lang mai
thanh vi » hanh vi, thanh va, thanh ve
thue va » thuc va, thuyet va, thuc vat
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
ky sang » ky nang, ky dang, ky tang
tu cao » cu cao, tu cac, vu cao
vi cua » vai cua, di cua
thu va » thuc va, tu va, thu ha
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cao ky sang mai hoi. ((hieu ve) OR (hieu va)) nam ((thu va) OR (thue va)) thanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky sang mai hoi. ((hieu ve) or (hieu va)) nam ((thu va) OR (thue va)) thanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu cao ky sang mai hoi. ((hieu ve) or (hieu va)) nam ((thu va) OR (thue va)) thanh vi cua te*.