Perhaps you should try some spelling variations:
tuan vien » tuan tien, xuan vien, tuan kien
vien cua » viec cua, dien cua, tien cua
van tuan » van quan, van ban, anh tuan
cham xuc » cam xuc, chat xuc, cham soc
hieu su » hieu sau, tieu su, hieu so
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sang ky » sang kyo, dang ky, bang ky
hieu vu » hieu va, hieu ve, dieu vu
tang ha » lang ha, tang ma, trung ha
tang ky » dang ky, trong ky, tang khu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sang ky) OR (tang ky)) tang ha noi. ((hieu vu) or (hieu su)) cham xuc van tuan vien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sang ky) OR (tang ky)) tang ha noi. ((hieu vu) OR (hieu su)) cham xuc van tuan vien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sang ky) OR (tang ky)) tang ha noi. ((hieu vu) or (hieu su)) cham xuc van tuan vien cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sang ky) OR (tang ky)) tang ha noi. ((hieu vu) or (hieu su)) cham xuc van tuan vien cua tre*.