Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
hanh ca » hanh cac, hanh cat, hanh cua
ve cam » ve cham, ve cac, va cam
ca cua » co cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu ve cam ((duc va) or (truc va)) hanh ca cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ve cam ((duc va) OR (truc va)) hanh ca cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ve cam ((duc va) or (truc va)) hanh ca cua viet*.