Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
truc may » tren may, truc va
ve cham » va cham, ve chat, vu cham
tinh vi » trinh vi, tinh voi, tinh va
cao hoi » cau hoi, co hoi, cao hoc
sanh v » sanh va, canh v
vi cua » vai cua, di cua
ve cam » ve cac, 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: so ((sanh v) OR (sanh _)) nang cao hoi. hieu ((ve cam) or (ve cham)) truc may tinh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh v) OR (sanh _)) nang cao hoi. hieu ((ve cam) OR (ve cham)) truc may tinh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sanh v) OR (sanh _)) nang cao hoi. hieu ((ve cam) or (ve cham)) truc may tinh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: so ((sanh v) OR (sanh _)) nang cao hoi. hieu ((ve cam) or (ve cham)) truc may tinh vi cua viet*.