Perhaps you should try some spelling variations:
thien van » thi van
tru nang » tra nang, tri nang, truc nano
su sach » so sach, vu sach
benh ve » benh va, benh vien, benh viem
duc bao » du bao, duc dao, duc ban
van cam » van nam, van lam, van cau
tu nang » tu nong, tu nano, tu lang
cua tre » cua te, cuu tre, cua triet
duc ba » duc ban, duc va, duc ha
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu nang) OR (tru nang)) x hoi. thien van cam ((duc ba) OR (duc bao)) benh ve cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) OR (tru nang)) x hoi. thien van cam ((duc ba) or (duc bao)) benh ve cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) OR (tru nang)) x hoi. thien van cam ((duc ba) or (duc bao)) benh ve cua tre*.