Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xac va » tac va, ac va, bac va
cua te » cua tu

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 nang xa hoi. hieu ve cham ((xac va) or (duc va)) hanh vi ((cua te) or (cua thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ve cham ((xac va) OR (duc va)) hanh vi ((cua te) OR (cua thuoc)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve cham ((xac va) or (duc va)) hanh vi ((cua te) or (cua thuoc))*.