Perhaps you should try some spelling variations:
dung sai » dung tai, dung va, dung dat
danh vai » danh sai, danh va, doanh van
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
ve cam » ve cham, ve cac, ve cai
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua 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 nang ma hoi. hieu ((ve cam) OR (va cam)) xuc va ((danh vai) or (dung sai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu ((ve cam) OR (va cam)) xuc va ((danh vai) OR (dung sai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu ((ve cam) OR (va cam)) xuc va ((danh vai) or (dung sai)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu ((ve cam) OR (va cam)) xuc va ((danh vai) or (dung sai)) cua te*.