Perhaps you should try some spelling variations:
trinh dinh » trinh kinh, trinh sinh, trinh dung
hinh dinh » binh dinh, hinh anh, tinh hinh
cau treo » cau theo, cau tren, cau triet
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ve chim » va chim, ve cham, ve chinh
ve chat » va chat, van chat
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang o hoi. hieu ((ve chim) or (ve chat)) xuc van ((hinh dinh) OR (trinh dinh)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu ((ve chim) OR (ve chat)) xuc van ((hinh dinh) OR (trinh dinh)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hoi. hieu ((ve chim) or (ve chat)) xuc van ((hinh dinh) OR (trinh dinh)) cau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu ((ve chim) or (ve chat)) xuc van ((hinh dinh) OR (trinh dinh)) cau treo*.