Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
ve triet » va trien, su triet
hoc mac » hoc ma, hoc may, hoc cac
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
mac ky » cac ky, sac ky, bac ky
cua tu » cua tuc, cua su, cua cu

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

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