Perhaps you should try some spelling variations:
chat thien » phat trien, cai thien, phat hien
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
ban xuc » ban xu, ban duoc, ban phuc
va hanh » van hanh, va thanh, va danh
hanh ly » khanh ly, hanh ky, hang ly
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 cach) or (tu sach)) ky ((nang xa) or (lang xa)) hoi. hieu van ban xuc va hanh ly chat thien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (tu sach)) ky ((nang xa) OR (lang xa)) hoi. hieu van ban xuc va hanh ly chat thien.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (tu sach)) ky ((nang xa) or (lang xa)) hoi. hieu van ban xuc va hanh ly chat thien*.