Perhaps you should try some spelling variations:
dinh cuu » dinh chi
su sach » so sach, vu sach
lang xa » dang xay, lang van
lang ha » long ha
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
vi cuu » vi luu, vinh cuu

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 y ((lang xa) OR (lang ha)) hoi. hieu va cam duc va hanh ((vi cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (lang ha)) hoi. hieu va cam duc va hanh ((vi cuu) OR (dinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) OR (lang ha)) hoi. hieu va cam duc va hanh ((vi cuu) or (dinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) OR (lang ha)) hoi. hieu va cam duc va hanh ((vi cuu) or (dinh cuu)) tre*.