Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dat » thanh san, thanh hai, thanh van
duc ban » duc tan, duc van, duc man
dat cua » dai cua, day cua, mat cua
dua ban » dia ban, cua ban, qua ban
tu sach » thu sach, su sach, te sach
van lam » van nam
van cam » van nam, van cau, van dam
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu ((van cam) OR (van lam)) ((duc ban) or (dua ban)) thanh dat cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ((van cam) OR (van lam)) ((duc ban) OR (dua ban)) thanh dat cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ((van cam) OR (van lam)) ((duc ban) or (dua ban)) thanh dat cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ((van cam) OR (van lam)) ((duc ban) or (dua ban)) thanh dat cua triet*.