Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, dieu vu
hieu su » hieu sau, tieu su, hieu so
soc van » hoc van, oc van, sac van
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu hoach)) ky nang xa hoi. ((hieu vu) OR (hieu su)) cham soc van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky nang xa hoi. ((hieu vu) OR (hieu su)) cham soc van hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu hoach)) ky nang xa hoi. ((hieu vu) OR (hieu su)) cham soc van hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ky nang xa hoi. ((hieu vu) OR (hieu su)) cham soc van hanh di cua triet*.