Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
thu dang » thu hang, thu bang, thu dong
su sach » so sach, vu sach
tuc van » thuc van, truc van, tuc va
dau tuc » dau tu, dao tuc, cau truc
xay hoi » xa hoi, tay hoi, cay phoi
tu dang » tu dong, su dang, vu dang
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua
va dau » va dao

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 ((tu dang) or (thu dang)) xay hoi. lieu va dau tuc van hanh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu dang) OR (thu dang)) xay hoi. lieu va dau tuc van hanh ((di cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu dang) or (thu dang)) xay hoi. lieu va dau tuc van hanh ((di cua) OR (de cua)) tre*".