Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
toc sai » toc san, toc dai, thuoc sai
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
ve cuac » ve cac, ve cuoc, ve chuan
dao may » tao may, xao may, dam may
tinh di » tinh doi, trinh di, tinh da
sai ky » sac ky
ve cua » le cua, de cua, te cua
di va » dai va, di vao, doi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sai ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cua) or (ve cuac)) dao may tinh di va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sai ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cua) OR (ve cuac)) dao may tinh di va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sai ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cua) or (ve cuac)) dao may tinh di va triet".
• Adding a wildcard symbol may retrieve word variants: toc sai ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cua) or (ve cuac)) dao may tinh di va triet*.