Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
hai cuc » tai cuc, hai cua, thai cua
cam loc » cam lo
cuc tre » duc tre, cua tre, cuu tre
hieu ve » hieu va
mau hoi » cau hoi, mai hoi, mau ho
ky danh » ky anh
ky dang » ky nang
loc va » hoc va, luc va

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 dang) OR (ky danh)) mau hoi. ((hieu ve) or (hieu van)) cam loc va thanh hai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky danh)) mau hoi. ((hieu ve) OR (hieu van)) cam loc va thanh hai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) OR (ky danh)) mau hoi. ((hieu ve) or (hieu van)) cam loc va thanh hai cuc tre*".