Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dao » lanh dao, thanh dat, thanh dam
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, dua tren
tuc van » thuc van, truc van, tuc va
tu sach » thu sach, su sach, tu cach
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
te sach » toc sach
van cam » van nam, van lam, van cau

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