Perhaps you should try some spelling variations:
va hanh » van hanh, va thanh, va danh
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
dao va » dao van, tao va, do va
ve cac » va cac, vien cac
ve ca » ve cai, ve cau, ve cua
vi su » va su, ve su, oi su
ki su » ky 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 ca) or (ve cac)) dao va hanh ((vi su) OR (ki su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu ((ve ca) OR (ve cac)) dao va hanh ((vi su) OR (ki su)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu ((ve ca) or (ve cac)) dao va hanh ((vi su) OR (ki su)) triet*".