Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
danh vai » danh va, doanh van, dang van
danh sai » dung sai, danh bat, danh dau
su triet » su viet, su tien, ve triet
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
ve dat » de dat, va dat, ve dao
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty xang xa hoi. hieu ve dat nuoc va ((danh vai) or (danh sai)) ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu ve dat nuoc va ((danh vai) OR (danh sai)) ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu ve dat nuoc va ((danh vai) or (danh sai)) ((cua triet) or (su triet))*.