Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
va tinh » may tinh
tinh di » tinh doi, trinh di, tinh da
cua tre » cua te, cuu tre, cua triet
cau tu » dau tu, cau truc
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: su sach ty nang x ho. ((hieu ve) or (hieu qua)) cau tu va tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang x ho. ((hieu ve) OR (hieu qua)) cau tu va tinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang x ho. ((hieu ve) or (hieu qua)) cau tu va tinh di cua tre*.