Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doan truc » doan trung, xuan truc, doan tu
van hanh » van thanh, ban hanh, van anh
dau truc » cau truc, dau tu, du tru
dai truc » dai thuc, dai trung, cau truc
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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: su sach ty nang xa hoi. lieu va ((((dau truc) OR (doan truc))) or (dai truc)) van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va ((((dau truc) OR (doan truc))) OR (dai truc)) van hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va ((((dau truc) OR (doan truc))) or (dai truc)) van hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va ((((dau truc) OR (doan truc))) or (dai truc)) van hanh di cua triet*.