Perhaps you should try some spelling variations:
khanh lai » khanh luan, thanh lap, thanh loi
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
xa khanh » xa thanh, van khanh, dat khanh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
thuc xa » thuc xay, tuc xa, thuc va
lai cua » dai cua, hai cua, lai chau
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: ((su sach) or (vu bach)) y nang ma hoa. hieu van nam thuc xa khanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) y nang ma hoa. hieu van nam thuc xa khanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu bach)) y nang ma hoa. hieu van nam thuc xa khanh lai cua triet*.