Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang thai » dang thi, dang hai, dang khai
bac nuoc » cac nuoc, bach tuoc, sach nuoc
san dang » van dang, san sang, ban dang
nuoc san » nuoc luan, nguoi san, nuoc quan
cua tre » cua te, cuu tre, dua tren
sinh ty » sinh ly, sinh y, dinh ty
thi van » thi lan, thi hanh, thi nang
sinh tu » tinh tu, dinh tu, sinh thuc
van bac » van ban, van bao, van hac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sinh ty) OR (sinh tu)) nang x hoi. thi van bac nuoc san dang thai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sinh ty) OR (sinh tu)) nang x hoi. thi van bac nuoc san dang thai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sinh ty) OR (sinh tu)) nang x hoi. thi van bac nuoc san dang thai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: hoc ((sinh ty) OR (sinh tu)) nang x hoi. thi van bac nuoc san dang thai ((cua tre) or (cua triet))*.