Perhaps you should try some spelling variations:
cua quoc » cua nuoc, cua thuoc
hieu van » hieu va, thien van, lieu va
nang mai » nang ma, lang mai, nang cai
ban hanh » ban hang
nang tai » hang tai, tang tai, sang tai
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
vi cua » vai cua, di cua

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 y ((nang mai) OR (nang tai)) hoi. ((hieu ve) or (hieu van)) cam xuc ban hanh vi cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang mai) OR (nang tai)) hoi. ((hieu ve) OR (hieu van)) cam xuc ban hanh vi cua quoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang mai) OR (nang tai)) hoi. ((hieu ve) or (hieu van)) cam xuc ban hanh vi cua quoc".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang mai) OR (nang tai)) hoi. ((hieu ve) or (hieu van)) cam xuc ban hanh vi cua quoc*.