Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
phat xuc » chat xuc, phat xuat, phap xu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
te sach » toc sach
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
vai va » mai va, dai va, hai va
vi va » vi van, vu va, bi va

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 va phat xuc va dan ((vi va) OR (vai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuat san)) ky nang xa hoi. hieu va phat xuc va dan ((vi va) OR (vai va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuat san)) ky nang xa hoi. hieu va phat xuc va dan ((vi va) OR (vai va)) triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuat san)) ky nang xa hoi. hieu va phat xuc va dan ((vi va) OR (vai va)) triet*.