Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » chat xuc, cham soc, pham duc
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac
cua su » qua 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 sac) or (tu sach)) ky lang xa hoi. hieu ve ((cham xuc) OR (cam xuc)) van hanh vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky lang xa hoi. hieu ve ((cham xuc) OR (cam xuc)) van hanh vi cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) or (tu sach)) ky lang xa hoi. hieu ve ((cham xuc) OR (cam xuc)) van hanh vi cua su".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu sach)) ky lang xa hoi. hieu ve ((cham xuc) OR (cam xuc)) van hanh vi cua su*.