Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
ban thanh » ban hanh
van phap » ban phap, va phap, van phan
ban hang » ngan hang
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
di cua » dai cua, doi cua, de 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: su sach ((ty hang) or (ly hang)) xa hoi. hieu van phap thuc ((ban thanh) OR (ban hang)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ly hang)) xa hoi. hieu van phap thuc ((ban thanh) OR (ban hang)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (ly hang)) xa hoi. hieu van phap thuc ((ban thanh) OR (ban hang)) di cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ly hang)) xa hoi. hieu van phap thuc ((ban thanh) OR (ban hang)) di cua te*.