Perhaps you should try some spelling variations:
thien van » thi van
sinh cua » manh cua, dinh cuu, sinh va
vinh cuu » dinh cuu, dinh cu, tinh cua
tuan doc » than doc, quan doc, tuan do
van tuan » van quan, van ban, anh tuan
dang xa » dang xay, lang xa, dang ha
sach ky » sach y, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
doc va » duoc va, hoc va, duc va
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ky) OR (sac ky)) dang xa hoi. thien van tuan doc va hanh ((vinh cuu) or (sinh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ky) OR (sac ky)) dang xa hoi. thien van tuan doc va hanh ((vinh cuu) OR (sinh cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ky) OR (sac ky)) dang xa hoi. thien van tuan doc va hanh ((vinh cuu) or (sinh cua)) tre".
• Adding a wildcard symbol may retrieve word variants: doc ((sach ky) OR (sac ky)) dang xa hoi. thien van tuan doc va hanh ((vinh cuu) or (sinh cua)) tre*.