Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
nang cai » nang cao, nang tai, nang cap
va doanh » van doanh, vay doanh, va danh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cai hoi » cau hoi, dai hoi, cai hoa
van cua » vang cua, ban cua, dan cua
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao

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 ky nang cai hoi. hieu ((ve cam) OR (va cam)) duc va doanh van cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang cai hoi. hieu ((ve cam) OR (va cam)) duc va doanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cai hoi. hieu ((ve cam) OR (va cam)) duc va doanh van cua triet*.