Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
manh hai » lanh hai, minh hai, thanh hai
danh hai » dang hai, lanh hai, danh hau
sach lo » sach dao, sach doi, sach hoi
cam luc » cam xuc, cau luc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
lo nang » ho nang, ly nang, loai nang
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, ma hoa, me hoi
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach lo nang ((ma hoi) or (xa hoi)). hieu va cam luc va ((danh hai) OR (manh hai)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo nang ((ma hoi) OR (xa hoi)). hieu va cam luc va ((danh hai) OR (manh hai)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo nang ((ma hoi) or (xa hoi)). hieu va cam luc va ((danh hai) OR (manh hai)) cau triet".
• Adding a wildcard symbol may retrieve word variants: su sach lo nang ((ma hoi) or (xa hoi)). hieu va cam luc va ((danh hai) OR (manh hai)) cau triet*.