Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
sach tham » sach nha
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu v » hieu va, hieu ve, hieu 2
v phap » va phap, ve phap, v pham
ma hoi » mai hoi, ma hoa, me hoi
cua tu » cua tuc, cua su, cua cu

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 thieu) or (sach tham)) nang ((ma hoi) OR (xa hoi)). hieu v phap thuc va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thieu) OR (sach tham)) nang ((ma hoi) OR (xa hoi)). hieu v phap thuc va hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thieu) or (sach tham)) nang ((ma hoi) OR (xa hoi)). hieu v phap thuc va hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: so ((sach thieu) or (sach tham)) nang ((ma hoi) OR (xa hoi)). hieu v phap thuc va hanh vai cua tu*.