Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
cua triet » cua viet, su triet, va triet
hieu va » lieu va, hieu qua
cao suc » cao su
va lang » va nang, hoa lang
lang va » lang van, hang va, lang ha
cao duc » dao duc, giao duc, tao duoc
y nang » ly nang, v nang, may nang
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san ((y nang) OR (ky nang)) xa hoi. hieu va ((cao duc) or (cao suc)) va lang va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ((y nang) OR (ky nang)) xa hoi. hieu va ((cao duc) OR (cao suc)) va lang va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ((y nang) OR (ky nang)) xa hoi. hieu va ((cao duc) or (cao suc)) va lang va cua triet".
• Adding a wildcard symbol may retrieve word variants: thuat san ((y nang) OR (ky nang)) xa hoi. hieu va ((cao duc) or (cao suc)) va lang va cua triet*.