Perhaps you should try some spelling variations:
sach ty » sach y, sach thu, xach tay
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
sach tu » sach thu, cach tu, sach uu
cac tu » cac thu, cach tu, cac du
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: thu ((sach ty) or (sach tu)) ((nang xa) OR (nang x)) hoi. hieu va cac tu va tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach tu)) ((nang xa) OR (nang x)) hoi. hieu va cac tu va tinh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) or (sach tu)) ((nang xa) OR (nang x)) hoi. hieu va cac tu va tinh di cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach tu)) ((nang xa) OR (nang x)) hoi. hieu va cac tu va tinh di cua tre*.