Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
tu sach » thu sach, te sach, tu cach
hai cuu » hai cua, hai chu, hai cuc
va manh » van manh, va danh, va hanh
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
su sach » so sach, vu sach
va cao » va cac, va co, va dao

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) OR (su sach)) ky ((nang xa) or (nang ma)) hoi. hieu va cao duc va manh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky ((nang xa) OR (nang ma)) hoi. hieu va cao duc va manh hai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky ((nang xa) or (nang ma)) hoi. hieu va cao duc va manh hai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky ((nang xa) or (nang ma)) hoi. hieu va cao duc va manh hai cuu tre*.