Perhaps you should try some spelling variations:
chat triet » chet triet, phat trien, chat thien
lam chat » luan chat, cao chat, ly chat
thu sach » thuat sach, thuoc sach, thu hoach
hanh lam » thanh lap, hanh kem, hanh va
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
van bac » van ban, van bao, van hac
tu sach » su sach, te sach, tu cach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
xuc va » duc va, tuc va, luc va

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 (thu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van bac xuc va hanh lam chat triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van bac xuc va hanh lam chat triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van bac xuc va hanh lam chat triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van bac xuc va hanh lam chat triet*.