Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoang van » hang va
ban hang » ngan hang
cao xuc » cam xuc, cao duc, cao suc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang ma) or (hoang van)) hoi. hieu va cao xuc ((ban hanh) OR (ban hang)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (hoang van)) hoi. hieu va cao xuc ((ban hanh) OR (ban hang)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) or (hoang van)) hoi. hieu va cao xuc ((ban hanh) OR (ban hang)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (hoang van)) hoi. hieu va cao xuc ((ban hanh) OR (ban hang)) dai cua triet*.