Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky ((nang xa) OR (lang xa)) hoi. lieu va cac tuc va hanh tai ((va triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky ((nang xa) OR (lang xa)) hoi. lieu va cac tuc va hanh tai ((va triet) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sac ky ((nang xa) OR (lang xa)) hoi. lieu va cac tuc va hanh tai ((va triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sac ky ((nang xa) OR (lang xa)) hoi. lieu va cac tuc va hanh tai ((va triet) or (cua te))*.