Perhaps you should try some spelling variations:
manh hai » lanh hai, minh hai, thanh hai
hai cua » thai cua, dai cua, hoi cua
xa manh » ha manh, van manh, day manh
hieu va » lieu va, hieu qua
tu sach » thu sach, te sach, tu cach
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
cau tu » dau tu, cau truc
tu xa » tu xay, tu va, te xa

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 lang) or (ky dang)) xa hoi. hieu va cau tu xa manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((ky lang) OR (ky dang)) xa hoi. hieu va cau tu xa manh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ((ky lang) or (ky dang)) xa hoi. hieu va cau tu xa manh hai cua tre*".