Perhaps you should try some spelling variations:
dia danh » dia ban, gia dinh
doc sac » doc sach, dac sac, hoc sach
va hanh » van hanh, va thanh, va danh
cao hoi » cau hoi, co hoi, cao hoc
luu tre » luu tru, cuu tre, luy tre
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
ve cam » ve cham, va cam, ve cai
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: doc sac ky nang cao hoi. hieu ((ve cam) OR (ve cac)) xuc ((va hanh) or (dia danh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sac ky nang cao hoi. hieu ((ve cam) OR (ve cac)) xuc ((va hanh) OR (dia danh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sac ky nang cao hoi. hieu ((ve cam) OR (ve cac)) xuc ((va hanh) or (dia danh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: doc sac ky nang cao hoi. hieu ((ve cam) OR (ve cac)) xuc ((va hanh) or (dia danh)) vi luu tre*.