Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
nam thuc » nam thuoc, am thuc, nam tu
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
cua tuc » cua duc, cua tu, cua thuoc
ly ang » ly hang, ly vang, ly nang
ang xa » lang xa, mang xa, dang xay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly ang xa hoi. ((hieu van) or (lieu va)) ((nam thuc) OR (nam thu)) van hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly ang xa hoi. ((hieu van) OR (lieu va)) ((nam thuc) OR (nam thu)) van hanh vi cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly ang xa hoi. ((hieu van) or (lieu va)) ((nam thuc) OR (nam thu)) van hanh vi cua tuc".
• Adding a wildcard symbol may retrieve word variants: vu sach ly ang xa hoi. ((hieu van) or (lieu va)) ((nam thuc) OR (nam thu)) van hanh vi cua tuc*.