Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
duoc ma » duoc lam
cua tre » cua te, cua triet, dua tren
ma hanh » va hanh, da hanh, na hanh
cuu tre » cau tren, cau treo
da duoc » tao duoc, hoa duoc
nang xa » nang x, lang xa, nang ma
van da » van dao, van dau, van dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuat san)) ky nang xa hoi. hieu van da duoc ma hanh dai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat san)) ky nang xa hoi. hieu van da duoc ma hanh dai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat san)) ky nang xa hoi. hieu van da duoc ma hanh dai ((cua tre) OR (cuu tre))*".