Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam truc » nam truoc, nam thuc, nam trung
ve triet » su triet
va trien » va truyen, va thiet, va tuyen
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
truc xa » tuc xa, truc va, truoc xay
xa hanh » xa thanh, xa khanh, va hanh
hanh ve » hanh vi, hanh va, hanh kem
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi

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 lang ha hoi. hieu van nam truc xa hanh ve ((ve triet) or (va trien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ha hoi. hieu van nam truc xa hanh ve ((ve triet) OR (va trien)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. hieu van nam truc xa hanh ve ((ve triet) or (va trien))*.