Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hoc sach » hoc sinh, hoc cac, hoc anh
bo sach » co sach
chu tre » cho tre, cuu tre, cau tren
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
van cam » van nam, van lam, van cau
chu tri » chua tri, chu thi, chu tai
xuc va » duc va, tuc va, luc va
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: ((bo sach) or (hoc sach)) ky nang x hoi. hieu van cam xuc va tinh va ((chu tre) OR (chu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((bo sach) OR (hoc sach)) ky nang x hoi. hieu van cam xuc va tinh va ((chu tre) OR (chu tri)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo sach) or (hoc sach)) ky nang x hoi. hieu van cam xuc va tinh va ((chu tre) OR (chu tri))".
• Adding a wildcard symbol may retrieve word variants: ((bo sach) or (hoc sach)) ky nang x hoi. hieu van cam xuc va tinh va ((chu tre) OR (chu tri))*.