Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cong cu » chung cu
va kinh » va tinh, qua kinh
va dinh » van dinh, va tinh, vu dinh
cau xuc » cam xuc, cau luc, cau truc
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, dang xay
cu tre » cu tren, cua tre, cuu tre

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 ((mang xa) or (nang x)) hoi. hieu van cau xuc ((va dinh) OR (va kinh)) cong cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((mang xa) OR (nang x)) hoi. hieu van cau xuc ((va dinh) OR (va kinh)) cong cu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((mang xa) or (nang x)) hoi. hieu van cau xuc ((va dinh) OR (va kinh)) cong cu tre*".