Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua cham » qua hai, qua cac, va cham
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
vi cua » vai cua, di cua
tuan » quan, tran, luan

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) or (sach ty)) nang xa hoi. hieu qua cham luc ((van hanh) or (tuan anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu qua cham luc ((van hanh) OR (tuan anh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu qua cham luc ((van hanh) or (tuan anh)) vi cua triet*.