Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
cai ky » cac ky, cam ky, sai ky
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((cai ky) OR (cao ky)) nang mai hoi. hieu van nhan luc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((cai ky) OR (cao ky)) nang mai hoi. hieu van nhan luc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((cai ky) OR (cao ky)) nang mai hoi. hieu van nhan luc va hanh vi cua tre*.