Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
danh hai » dang hai, lanh hai, danh hau
manh hai » lanh hai, minh hai, thanh hai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
cam tuc » cam xuc, cam tu, nam thuc

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 ky nang xa hoi. ((thien van) or (thi van)) cam tuc xa ((danh hai) OR (manh hai)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((thien van) OR (thi van)) cam tuc xa ((danh hai) OR (manh hai)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((thien van) or (thi van)) cam tuc xa ((danh hai) OR (manh hai)) cau triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((thien van) or (thi van)) cam tuc xa ((danh hai) OR (manh hai)) cau triet*.