Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
tuan doc » than doc, quan doc, tuan do
cau tren » cu tren, dau tren, ca tren
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te ban » te bao
ban ky » van ky, dan ky
doc va » duoc va, hoc va, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ban ky lang xa hoi. hieu van tuan doc va hanh vi ((cau tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ky lang xa hoi. hieu van tuan doc va hanh vi ((cau tren) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: te ban ky lang xa hoi. hieu van tuan doc va hanh vi ((cau tren) or (cua tre))*.