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