Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
hanh hai » thanh hai, nhanh hai, hang hai
vat hanh » vat thanh, van hanh, va hanh
so sach » so sanh, bo sach, hoc sach
hai cuu » hai cua, hai chu, hai cuc
va phap » va phat, ban phap
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
lang ha » long ha
lang xa » dang xay, lang van
co sach » bo sach, cuon sach, hoc sach

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) or (co sach)) tu ((lang xa) or (lang ha)) hoi. hieu va phap thuc vat hanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) tu ((lang xa) OR (lang ha)) hoi. hieu va phap thuc vat hanh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) tu ((lang xa) or (lang ha)) hoi. hieu va phap thuc vat hanh hai cuu tre*.