Perhaps you should try some spelling variations:
thien van » thi van
va triet » va thiet, va trien, ve triet
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
cac duc » cac du, cao duc, cac dac
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
lai va » loai va, mai va, dai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. ((((hieu ve) or (hieu va))) or (thien van)) cac duc va hanh lai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((((hieu ve) OR (hieu va))) OR (thien van)) cac duc va hanh lai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((((hieu ve) or (hieu va))) or (thien van)) cac duc va hanh lai va triet*.