Perhaps you should try some spelling variations:
van chat » cao chat
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
va cham » va tham
va chat » va phat, cao chat, hoa chat
luu van » cuu van, luan van, luu hanh
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang xa hoi. hieu ((va cham) or (((va chat) OR (van chat)))) luu van hanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang xa hoi. hieu ((va cham) OR (((va chat) OR (van chat)))) luu van hanh vai su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang xa hoi. hieu ((va cham) or (((va chat) OR (van chat)))) luu van hanh vai su triet*".