Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
ban hanh » ban hang
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
nang mai » nang ma, nang tai, lang mai
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
mai hoi » mai khoi, dai hoi, lai hoi
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang mai hoi. hieu van cam tuc ((va thanh) or (ban hanh)) doi ((su triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai hoi. hieu van cam tuc ((va thanh) OR (ban hanh)) doi ((su triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai hoi. hieu van cam tuc ((va thanh) or (ban hanh)) doi ((su triet) or (va triet))*.