Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
han lai » han tai, han li, phan loai
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky ((nang xa) or (nang ma)) hoi. hieu van cam truc va han lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky ((nang xa) OR (nang ma)) hoi. hieu van cam truc va han lai su triet.
• Adding a wildcard symbol may retrieve word variants: te san ky ((nang xa) or (nang ma)) hoi. hieu van cam truc va han lai su triet*.