Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
pham duy » pham duc
dinh chi » dinh thi, dinh tri, dinh moi
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duy ban » uy ban, duy van, duy can
vi cuu » vi luu, vinh cuu

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 xang xa hoi. hieu va pham duy ban thanh ((vi cuu) or (((dinh cuu) OR (dinh chi)))) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) OR (((dinh cuu) OR (dinh chi)))) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) or (((dinh cuu) OR (dinh chi)))) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu va pham duy ban thanh ((vi cuu) or (((dinh cuu) OR (dinh chi)))) tre*.