Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
thanh ve » hanh ve, thanh va, thanh vien
thuc ban » thuoc ban, thuc dan, thu ban
va triet » va thiet, va trien, ve triet
lang xa » lang ha, dang xay, lang van
va pham » van pham, va phat, va phap
sach ty » sach y, sach tu, sach thu
mang xa » mang may, dang xay, mang cua
su sach » so sach, vu sach

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 ((mang xa) or (lang xa)) hoi. lieu va pham thuc ban thanh ve ((cau tren) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((mang xa) OR (lang xa)) hoi. lieu va pham thuc ban thanh ve ((cau tren) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ty ((mang xa) or (lang xa)) hoi. lieu va pham thuc ban thanh ve ((cau tren) or (va triet))*.