Perhaps you should try some spelling variations:
trinh di » trinh do, trinh dien, trinh dinh
tu sach » thu sach, su sach, te sach
tinh di » tinh doi, tinh da, tin di
nam xuc » cam xuc, nam xua, nam thuc
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
tang xa » trang xa, lang xa, tang ha
xuc va » duc va, tuc va, luc va
va nam » van nam, ha nam, va nay

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 ((tang xa) or (tang ma)) hoi. hieu va nam xuc va ((tinh di) OR (trinh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((tang xa) OR (tang ma)) hoi. hieu va nam xuc va ((tinh di) OR (trinh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((tang xa) or (tang ma)) hoi. hieu va nam xuc va ((tinh di) OR (trinh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((tang xa) or (tang ma)) hoi. hieu va nam xuc va ((tinh di) OR (trinh di)) cua tre*.