Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
hanh cua » manh cua, hang cua, hanh sua
su sach » so sach, vu sach
va hanh » van hanh, va thanh, va danh
vu nang » vuc nang, va nang, vu dang
nang xa » nang x, lang xa, nang ma
sach vu » sach va, sach tu, sach uu
luc va » duc va, tuc va, loc va
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 vu nang xa hoi. hieu ((ve cam) OR (ve cac)) luc va hanh cua ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang xa hoi. hieu ((ve cam) OR (ve cac)) luc va hanh cua ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach vu nang xa hoi. hieu ((ve cam) OR (ve cac)) luc va hanh cua ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: su sach vu nang xa hoi. hieu ((ve cam) OR (ve cac)) luc va hanh cua ((cua viet) or (cua vat))*.