Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve cham » ve chat, vu cham, ve chim
va cham » va chat, va tham
luu tre » luu tru, cuu tre, luy tre
luc va » tuc va, loc va
vi luu » vi lua

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