Perhaps you should try some spelling variations:
trinh lap » trinh luat, trinh luan, trinh phap
dinh lap » dinh lam, dinh lang, dinh phap
su sach » so sach, vu sach
cam luc » cam xuc, cau luc
hieu ve » hieu van
sach ky » sac ky, sach y, sach ty
danh vi » hanh vi, dinh vi, danh di
hieu va » lieu va, hieu qua
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
cua te » cua tu
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((dinh lap) OR (trinh lap)) hai. ((hieu ve) or (hieu va)) cam luc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dinh lap) OR (trinh lap)) hai. ((hieu ve) OR (hieu va)) cam luc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((dinh lap) OR (trinh lap)) hai. ((hieu ve) or (hieu va)) cam luc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dinh lap) OR (trinh lap)) hai. ((hieu ve) or (hieu va)) cam luc va danh vi cua te*.