Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham cuu » cap cuu, chat cua
thanh ly » thanh lay, thanh ky, thanh le
te sach » toc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
cuu gia » cuu giai, cuu giao, cua gia
cua tre » cua te, cuu tre, dua tren
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y tang ((ma hoi) OR (xa hoi)). hieu va cham cuu gia thanh ly ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ((ma hoi) OR (xa hoi)). hieu va cham cuu gia thanh ly ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ((ma hoi) OR (xa hoi)). hieu va cham cuu gia thanh ly ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y tang ((ma hoi) OR (xa hoi)). hieu va cham cuu gia thanh ly ((cua tre) or (cua triet))*.