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