Perhaps you should try some spelling variations:
nhanh li » nhanh vi, thanh loi, nhanh thi
so sach » so sanh, bo sach, co sach
su sach » vu sach
hieu ve » hieu va, hieu van
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
ca tren » cau tren, cu tren, la tren
ve cao » va cao, ve bao, ve cac
li ca » ly ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (su sach)) ky nang x ho. hieu ve cao ((duc ban) OR (duc van)) nhanh li ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (su sach)) ky nang x ho. hieu ve cao ((duc ban) OR (duc van)) nhanh li ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (su sach)) ky nang x ho. hieu ve cao ((duc ban) OR (duc van)) nhanh li ca tren".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (su sach)) ky nang x ho. hieu ve cao ((duc ban) OR (duc van)) nhanh li ca tren*.