Perhaps you should try some spelling variations:
danh mai » danh sai, doanh moi, dinh moi
tu sach » thu sach, su sach, te sach
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cu tren » tu tren, dua tren
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va
mai cu » mai cua, mai co, mai tu

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 sang) or (ky tang)) mai hoi. hieu ve cam ((xuc va) or (duc va)) danh mai cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky tang)) mai hoi. hieu ve cam ((xuc va) OR (duc va)) danh mai cu tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky tang)) mai hoi. hieu ve cam ((xuc va) or (duc va)) danh mai cu tren*.