Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lo nang » ho nang, loai nang, cao nang
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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 ((lo nang) or (ly nang)) xa hoi. hieu ve cam duc va ((hanh vi) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((lo nang) OR (ly nang)) xa hoi. hieu ve cam duc va ((hanh vi) OR (hang va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((lo nang) or (ly nang)) xa hoi. hieu ve cam duc va ((hanh vi) or (hang va)) cua tre*.