Perhaps you should try some spelling variations:
thuat san » thuat song, thuat lanh, thuat xay
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
tan minh » tran minh, tuan minh, van minh
minh dai » minh dao, sinh dai, minh hai
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
cac suc » cao suc, cac cuoc, cac quoc
cua tu » cua tuc, cua su, cua cu

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) OR (thuat toan)) _ tang xa hoi. hieu va ((cac suc) or (cac nuoc)) tan minh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat san) OR (thuat toan)) _ tang xa hoi. hieu va ((cac suc) OR (cac nuoc)) tan minh dai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat san) OR (thuat toan)) _ tang xa hoi. hieu va ((cac suc) or (cac nuoc)) tan minh dai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((thuat san) OR (thuat toan)) _ tang xa hoi. hieu va ((cac suc) or (cac nuoc)) tan minh dai cua tu*.