Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dung thai » duong thai, dung tai, dung hai
cam thuc » am thuc, nam thuc, can thuc
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cam thu » nam thu, cac thu, ca thu
va dung » van dung, va duong, vat dung
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu qua ((cam thuc) OR (cam thu)) va dung thai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu qua ((cam thuc) OR (cam thu)) va dung thai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu qua ((cam thuc) OR (cam thu)) va dung thai cua triet*.