Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
nham thuc » nhan thuc, nam thuc, nham thu
cau treo » cau theo, cau tren, cau trieu
hanh vai » hanh vi, hanh va, hanh tai
ty hoang » ty hang, huy hoang, thi hoang
hoang xa » hoang ha, hoang va, hoang xuan
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
bo sach » co sach, hoc sach
ve nham » ve nha, ve cham

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) or (bo sach)) ty hoang xa hoi. hieu ve nham thuc va hanh vai ((cau treo) OR (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (bo sach)) ty hoang xa hoi. hieu ve nham thuc va hanh vai ((cau treo) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (bo sach)) ty hoang xa hoi. hieu ve nham thuc va hanh vai ((cau treo) OR (cau triet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (bo sach)) ty hoang xa hoi. hieu ve nham thuc va hanh vai ((cau treo) OR (cau triet))*.