Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
khach tu » khach deu, khanh thu, hanh tu
hanh tri » thanh tri, hanh tai, hanh triet
cao luc » bao luc, cao duc, cao suc
luc van » luoc van, luu van, duc van
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
ang xa » lang xa, mang xa, dang xay
tu ang » tu lang, tu anc, tu anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach tu ang xa hoi. hieu va cao luc van ((hanh tri) OR (hanh trinh)) ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach tu ang xa hoi. hieu va cao luc van ((hanh tri) OR (hanh trinh)) ((cua triet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach tu ang xa hoi. hieu va cao luc van ((hanh tri) OR (hanh trinh)) ((cua triet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu khach tu ang xa hoi. hieu va cao luc van ((hanh tri) OR (hanh trinh)) ((cua triet) or (cuu tre))*.