Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham thu » nham thu, pham thu, chim thu
hang tai » hang va, dung tai
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
cam thu » nam thu, cac thu, ca thu
va hang » van hang, va nang, va lang
y nang » ky nang, ly nang, v nang
tai su » tai so, tai tu, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu qua ((cham thu) OR (cam thu)) va hang tai su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. hieu qua ((cham thu) OR (cam thu)) va hang tai su triet".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu qua ((cham thu) OR (cam thu)) va hang tai su triet*.