Perhaps you should try some spelling variations:
tuan hai » tuan khai, quan hai, tran hai
van tuan » van quan, van ban, anh tuan
thu sai » thu hai, thu tai, thu san
hai cua » thai cua, dai cua, hoi cua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
tang ho » tang cho, tung ho, tang ha
nang ho » nang hoc, nang co, nang cao
sai ky » sac ky
ve cac » va cac, vien cac

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

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