Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach van » sach han, sach va, bach van
su triet » su viet, su tien, ve triet
nang xa » lang xa, nang ma, mang xa
van dau » phan dau
xuc van » duc van, luc van, vuc van
hanh de » hanh ve, hanh kem
su sach » so sach, vu sach
de su » den su, ve su, de tu

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 van ((nang xa) or (nang x)) hoi. thien ((van dau) OR (van dao)) xuc van hanh de su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van ((nang xa) OR (nang x)) hoi. thien ((van dau) OR (van dao)) xuc van hanh de su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach van ((nang xa) or (nang x)) hoi. thien ((van dau) OR (van dao)) xuc van hanh de su triet*".