Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh va » hanh va, thanh ha, thanh ve
huu tre » huu tri, cuu tre, huu them
soc ban » hoc ban, coc ban, so ban
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
may hoi » may thoi, tay hoi, mai hoi
sach ty » sach y, sach tu, sach thu
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sai ky) or (sach ty)) mang may hoi. hieu vu cham soc ban ((thanh va) OR (thanh van)) huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sai ky) OR (sach ty)) mang may hoi. hieu vu cham soc ban ((thanh va) OR (thanh van)) huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sai ky) or (sach ty)) mang may hoi. hieu vu cham soc ban ((thanh va) OR (thanh van)) huu tre".
• Adding a wildcard symbol may retrieve word variants: te ((sai ky) or (sach ty)) mang may hoi. hieu vu cham soc ban ((thanh va) OR (thanh van)) huu tre*.