Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu cua » hieu qua, dieu cua, bieu cua
cua nhan » ca nhan, cua ngan, cua nha
nhan duc » nhan duoc, nhan luc, phan duc
hang doi » hang di, hang loi, huong doi
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va hang » van hang, va nang, va lang
doi cua » dai cua, hoi cua
ma hoi » mai hoi, xa hoi, ma hoa

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) or (toc sach)) ky nang ma hoi. hieu cua nhan duc va hang doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (toc sach)) ky nang ma hoi. hieu cua nhan duc va hang doi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (toc sach)) ky nang ma hoi. hieu cua nhan duc va hang doi cua triet*.