Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
cac ban » cac dan, cac van, can ban
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
cam cac » ca cac, nam cac, cam chan
y tang » ky tang, 6 tang, 7 tang
ve cam » ve cham, ve cac, va cam

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 tang ((van hoi) OR (van hoe)). hieu ve cam cac ban thanh vai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y tang ((van hoi) OR (van hoe)). hieu ve cam cac ban thanh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y tang ((van hoi) OR (van hoe)). hieu ve cam cac ban thanh vai ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y tang ((van hoi) OR (van hoe)). hieu ve cam cac ban thanh vai ((cua triet) or (su triet))*.