Perhaps you should try some spelling variations:
manh hang » manh thang, manh hung, minh hang
te sach » toc sach
cao suc » cao su, cao duc
cam suc » cam xuc, cham soc
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cam suc) or (cao suc)) manh hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cam suc) OR (cao suc)) manh hang va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cam suc) or (cao suc)) manh hang va cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty hang)) xa hoi. hieu ve ((cam suc) or (cao suc)) manh hang va cua tre*.