Perhaps you should try some spelling variations:
trong van » trong cac
tang luan » dung luan
pham thuc » phap thuc, pham chuc, nham thuc
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu ((tang luan) or (trong van)) hoi. hieu va pham thuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((tang luan) OR (trong van)) hoi. hieu va pham thuc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((tang luan) or (trong van)) hoi. hieu va pham thuc va hanh vi cua te*.