Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
lang va » lang van, hang va, lang ha
va lang » va nang, hoa lang
cao suc » cao su
cao duc » dao duc, giao duc, tao duoc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va cua » va chua, via cua, ca cua
san y » dan y, san _

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