Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hanh tai
cac xuc » cam xuc, cac nuoc, chat xuc
van cac » van hac, van cau, van bac
xuc va » duc va, tuc va, luc va
dai ky » dan ky, sai ky
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((dai ky) OR (dai ly)) nang x hoi. hieu van cac xuc va ((hanh hai) or (hang hai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((dai ky) OR (dai ly)) nang x hoi. hieu van cac xuc va ((hanh hai) OR (hang hai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((dai ky) OR (dai ly)) nang x hoi. hieu van cac xuc va ((hanh hai) or (hang hai)) cua te".
• Adding a wildcard symbol may retrieve word variants: su ((dai ky) OR (dai ly)) nang x hoi. hieu van cac xuc va ((hanh hai) or (hang hai)) cua te*.