Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, vu khach
di cua » dai cua, doi cua, de cua
cua te » cua tu
nuoc » quoc, duoc, ngoc

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. ((hieu ve) OR (hieu van)) dat nuoc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ty nang xa hoi. ((hieu ve) OR (hieu van)) dat nuoc va hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ty nang xa hoi. ((hieu ve) OR (hieu van)) dat nuoc va hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ty nang xa hoi. ((hieu ve) OR (hieu van)) dat nuoc va hanh di cua te*.