Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cao hoa » cao hoat, cao khoa, cau hoa
hieu ve » hieu van
hieu va » lieu va, hieu qua
cua duc » cua tuc, cua nuoc, cua quoc
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
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 nang cao hoa. ((hieu ve) OR (hieu va)) cam xuc va dan vi ((cua tu) or (cua duc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoa. ((hieu ve) OR (hieu va)) cam xuc va dan vi ((cua tu) OR (cua duc))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoa. ((hieu ve) OR (hieu va)) cam xuc va dan vi ((cua tu) or (cua duc))*".