Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va dang » van dang, va lang, da dang
va nang » van nang, da nang, cam nang
san ky » sang ky, van ky, dan ky
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 ky nang xa hoi. hieu va cac nuoc ((va dang) OR (va nang)) thi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky nang xa hoi. hieu va cac nuoc ((va dang) OR (va nang)) thi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ky nang xa hoi. hieu va cac nuoc ((va dang) OR (va nang)) thi ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thuat san ky nang xa hoi. hieu va cac nuoc ((va dang) OR (va nang)) thi ((cua te) or (cua tu))*.