Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » cua viet, su triet, va triet
chat luc » chat xuc, chat lua, nhan luc
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
va chat » van chat, va phat, cao chat
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, dua tren
y nang » ly nang, v nang, may nang

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 ((y nang) or (ky nang)) xa hoi. lieu va chat luc van thanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((y nang) OR (ky nang)) xa hoi. lieu va chat luc van thanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((y nang) or (ky nang)) xa hoi. lieu va chat luc van thanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) or (ky nang)) xa hoi. lieu va chat luc van thanh vi ((cua tre) OR (cua triet))*.