Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
manh cua » doanh cua, ban cua
hanh cua » hang cua, hanh sua, doanh cua
cam luc » cam xuc, cau luc
luc van » luoc van, luu van, duc van
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam

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

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