Perhaps you should try some spelling variations:
chat xuc » chat huu, cam xuc, chao xu
cac doan » cac doanh, cac dan, cac don
hanh ky » hanh kem
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
tang ky » dang ky, trong ky, tang khu
cac xuc » cam xuc, cac nuoc, cac cuoc
va cua » va chua, via cua, ca cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: do ((tang ky) or (hanh ky)) nang cao hoi. hieu ve ((cac xuc) or (chat xuc)) cac doan va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: do ((tang ky) OR (hanh ky)) nang cao hoi. hieu ve ((cac xuc) OR (chat xuc)) cac doan va cua tu.
• Adding a wildcard symbol may retrieve word variants: do ((tang ky) or (hanh ky)) nang cao hoi. hieu ve ((cac xuc) or (chat xuc)) cac doan va cua tu*.