Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang tai » hang va, dung tai
xuc ban » duc ban, cuc ban, quoc ban
han tai » nhan tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc

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 ky ((nang doc) OR (nang luc)) hai. hieu va cac xuc ban ((han tai) or (hang tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang doc) OR (nang luc)) hai. hieu va cac xuc ban ((han tai) OR (hang tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang doc) OR (nang luc)) hai. hieu va cac xuc ban ((han tai) or (hang tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang doc) OR (nang luc)) hai. hieu va cac xuc ban ((han tai) or (hang tai)) cua triet*.