Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
ve cuac » ve cac, ve cuoc, ve chuan
va hanh » va thanh, va danh, ban hanh
sac ky » cac ky, sai ky
ve cua » le cua, de cua, te cua
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. hieu ((ve cua) or (ve cuac)) dao ((va hanh) OR (van hanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu ((ve cua) OR (ve cuac)) dao ((va hanh) OR (van hanh)) vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu ((ve cua) or (ve cuac)) dao ((va hanh) OR (van hanh)) vi su triet*".