Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
thu nang » thi nang, thu hang, thu bang
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach
hanh di » hanh vi, hanh de, hang di
tuc van » thuc van, truc van, tuc va
dau tuc » dau tu, dao tuc, cau truc
cua tre » cua te, cuu tre, cua triet
va dau » va dao
ma hoi » mai hoi, ma hoa, me hoi
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (vu khach)) thu nang ((ma hoi) OR (xa hoi)). lieu va dau tuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) thu nang ((ma hoi) OR (xa hoi)). lieu va dau tuc van hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khach)) thu nang ((ma hoi) OR (xa hoi)). lieu va dau tuc van hanh di cua tre*".