Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh vai » doanh tai, doanh va, doanh van
van doanh » toan doanh, van dong, van thanh
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
vai cua » dai cua, hai cua, lai cua
sach ky » sach y, sach ty, sach kem
nang xa » lang xa, nang ma, mang xa
cac le » cach le, cac he, mac le
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu vien cac le van doanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) ((nang xa) OR (nang x)) hoi. hieu vien cac le van doanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu vien cac le van doanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) ((nang xa) OR (nang x)) hoi. hieu vien cac le van doanh vai cua triet*.