Perhaps you should try some spelling variations:
thien van » thi van
hanh dai » hanh tai, hanh dao, vanh dai
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
cac loc » cac lop, cac toc, cac hoc
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
loc va » hoc va, luc va
dai ve » dap ve, dau ve, dai va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((lieu va) or (thien van)) cac loc va hanh dai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((lieu va) OR (thien van)) cac loc va hanh dai ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((lieu va) or (thien van)) cac loc va hanh dai ve triet*.