Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
thue va » thuc va, thuyet va, thuc vat
ve cham » va cham, ve chat, vu cham
su sach » so sach, vu sach
tang ma » mang may, tang van
lang xa » lang ha, dang xay, lang van
va cua » va chua, via cua, ca 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: su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) thue va thanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) thue va thanh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) thue va thanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) or (tang ma)) hoi. hieu ((ve cam) OR (ve cham)) thue va thanh va cua triet*.