Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
van hanh » van thanh, ban hanh, van anh
dao tuc » dao duc
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
dau tuc » dau tu, cau truc, dau nuoc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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 tuc) OR (dao tuc)) van hanh doi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang xa hoi. lieu va ((dau tuc) OR (dao tuc)) van hanh doi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. lieu va ((dau tuc) OR (dao tuc)) van hanh doi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. lieu va ((dau tuc) OR (dao tuc)) van hanh doi ((cua tre) or (cua triet))*.