Perhaps you should try some spelling variations:
su sach » so sach
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
tu van » tu va
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) or (vu sach)) ty nang xa hoi. lieu va dau tu van ((hanh di) OR (hang di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. lieu va dau tu van ((hanh di) OR (hang di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. lieu va dau tu van ((hanh di) OR (hang di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty nang xa hoi. lieu va dau tu van ((hanh di) OR (hang di)) cua tre*.