Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
lap cua » lai cua, tap cua, lam cua
cac bac » cac bai, cac ban, cac cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
cac dac » cac dan, cac dai, cac tac

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 ((ky lang) OR (ky tang)) ha noi. hieu ve ((cac dac) or (cac bac)) va thanh lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) ha noi. hieu ve ((cac dac) OR (cac bac)) va thanh lap cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky tang)) ha noi. hieu ve ((cac dac) or (cac bac)) va thanh lap cua triet*".