Perhaps you should try some spelling variations:
toc van » hoc van, toc san, tac van
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
ca lao » cua lao, ca dao, ca cao
lao va » tao va, cao va, bao va
di cua » dai cua, doi cua, de cua
ve ca » ve cac, ve cai, ve cau

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

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