Perhaps you should try some spelling variations:
thieu giong » thi giong, nghiem giong
thu sach » tu sach, thuat sach, thuoc sach
tuan luc » than luc, tuan khuc, nhan luc
giong xa » giong va, giong cay, giong rau
thi van » thi lan, thi hanh, thi nang
va danh » va dinh, va dan, va hanh
luc va » duc va, tuc va, loc va
di cau » diem cau
da cau » dat cau, va cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach thieu giong xa hoi. ((thien van) OR (thi van)) tuan luc va danh ((di cau) or (da cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thieu giong xa hoi. ((thien van) OR (thi van)) tuan luc va danh ((di cau) OR (da cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thieu giong xa hoi. ((thien van) OR (thi van)) tuan luc va danh ((di cau) or (da cau)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach thieu giong xa hoi. ((thien van) OR (thi van)) tuan luc va danh ((di cau) or (da cau)) tre*.