Perhaps you should try some spelling variations:
chat duc » chat xuc, chat doc, chet duoc
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
va triet » va thiet, ve triet, cua triet
va trien » va truyen, va thiet, va tuyen
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
duc van » duc va, duc tan, duc manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ve chat duc van hanh lam ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. hieu ve chat duc van hanh lam ((va triet) OR (va trien))".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve chat duc van hanh lam ((va triet) OR (va trien))*.