Perhaps you should try some spelling variations:
manh hon » manh ho, minh hon, manh huong
cam suc » cam xuc, cham soc
tai cua » thai cua, tai cuc, tri cua
hon tai » khon tai, von tai, han tai
cao suc » cao su, cao duc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
x hoi » xa hoi, o hoi, x ho

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 ky) or (sach y)) nang x hoi. hieu ve ((cam suc) OR (cao suc)) manh hon tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang x hoi. hieu ve ((cam suc) OR (cao suc)) manh hon tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach y)) nang x hoi. hieu ve ((cam suc) OR (cao suc)) manh hon tai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach y)) nang x hoi. hieu ve ((cam suc) OR (cao suc)) manh hon tai cua tre*.