Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
mai hoi » mai khoi, dai hoi, lai hoi
van tam » van tham, van tai, van tan
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
tam tu » nam tu, cam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky nang mai hoi. hieu van tam tu va hanh vi ((((cua tre) or (cuu tre))) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang mai hoi. hieu van tam tu va hanh vi ((((cua tre) OR (cuu tre))) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu van ky nang mai hoi. hieu van tam tu va hanh vi ((((cua tre) or (cuu tre))) or (su triet))*.