Perhaps you should try some spelling variations:
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
dang ha » dong ha, dung ha, tang ha
tai cua » thai cua, tai cuc, tri cua
lang ha » long ha
hieu va » lieu va, hieu qua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((dang ha) or (lang ha)) noi. ((thien van) or (hieu va)) cham xuc van hanh tai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((dang ha) OR (lang ha)) noi. ((thien van) OR (hieu va)) cham xuc van hanh tai cua su.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((dang ha) or (lang ha)) noi. ((thien van) or (hieu va)) cham xuc van hanh tai cua su*.