Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thi nang » thi cong, ki nang, thi hanh
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
su sach » so sach, vu sach
van hau » van ha, van hai, van dau
hau cuc » hai cuc, hau cua, pham cuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, te sach, tu cach
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: ((tu sach) or (su sach)) thi nang ma hoi. hieu van hau cuc ban hanh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) thi nang ma hoi. hieu van hau cuc ban hanh vi ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) thi nang ma hoi. hieu van hau cuc ban hanh vi ((cua tre) or (cua triet))*.