Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
hieu van » hieu va, thien van, lieu va
te sach » toc sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
va dao » ca dao
va cuu » va cau, va chu
va huu » vu huu

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 van cham duc va dao ((va cuu) or (va huu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty hang)) xa hoi. hieu van cham duc va dao ((va cuu) OR (va huu)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty hang)) xa hoi. hieu van cham duc va dao ((va cuu) or (va huu)) tre*.