Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
hanh cua » manh cua, hang cua, hanh sua
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
ve chat » va chat, van chat
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: bo sach ky nang xa hoi. hieu ((ve cam) or (ve chat)) luc van hanh cua ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky nang xa hoi. hieu ((ve cam) OR (ve chat)) luc van hanh cua ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach ky nang xa hoi. hieu ((ve cam) or (ve chat)) luc van hanh cua ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: bo sach ky nang xa hoi. hieu ((ve cam) or (ve chat)) luc van hanh cua ((cua triet) OR (cua viet))*.