Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
cac xuc » cam xuc, chat xuc, cac cuoc
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sang ky nang xa hoi. hieu van ((cac xuc) OR (cac nuoc)) cac dan ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sang ky nang xa hoi. hieu van ((cac xuc) OR (cac nuoc)) cac dan ((di cua) OR (dai cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky nang xa hoi. hieu van ((cac xuc) OR (cac nuoc)) cac dan ((di cua) or (dai cua)) te*".