Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, lam truoc
va phan » van phan, va phat, va phap
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
tai so » tai sao, dai so, tai co
tai su » tai tu, lai su, tai du
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
va han » van han, va hanh, va hang

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 hoi. hieu van cam truc ((va han) or (va phan)) ((tai su) OR (tai so)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky nang xa hoi. hieu van cam truc ((va han) OR (va phan)) ((tai su) OR (tai so)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky nang xa hoi. hieu van cam truc ((va han) or (va phan)) ((tai su) OR (tai so)) triet".
• Adding a wildcard symbol may retrieve word variants: te san ky nang xa hoi. hieu van cam truc ((va han) or (va phan)) ((tai su) OR (tai so)) triet*.