Perhaps you should try some spelling variations:
can thanh » ban thanh, van thanh, cac thanh
vinh cuu » dinh cuu, sinh cua, dinh cu
dang xay » dang van, van xay
pham duy » pham duc
su sach » so sach, vu sach
va pham » van pham, va phat, va phap
duy can » duy van
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
vi cuu » vi luu

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