Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
pham thuc » phap thuc, nham thuc, pham thu
ban hanh » ban hang
lang van » dang van, tang van, hoang van
su sach » so sach, vu sach
hanh ve » hanh vi, hanh va, hanh kem
sach ty » sach y, sach tu, sach thu
mang xa » lang xa, mang may, dang xay
cuu tre » cua tre, cau tren, cau treo
ve cuu » ve cau, ve chu, ve cua

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 ((mang xa) or (lang van)) hoi. lieu va ((pham thuc) OR (pham chuc)) ban hanh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((mang xa) OR (lang van)) hoi. lieu va ((pham thuc) OR (pham chuc)) ban hanh ve cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((mang xa) or (lang van)) hoi. lieu va ((pham thuc) OR (pham chuc)) ban hanh ve cuu tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((mang xa) or (lang van)) hoi. lieu va ((pham thuc) OR (pham chuc)) ban hanh ve cuu tre*.