Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dua tren » dung tren
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
cam luc » cau luc
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: tu sach ty nang xa hoi. hieu van ((cam luc) OR (cam xuc)) van hanh lai ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu van ((cam luc) OR (cam xuc)) van hanh lai ((dua tren) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu van ((cam luc) OR (cam xuc)) van hanh lai ((dua tren) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu van ((cam luc) OR (cam xuc)) van hanh lai ((dua tren) or (cua triet))*.