Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
vien cau » vien cac, vien cao, vien sau
luu van » cuu van, luan van, luu hanh
nang xa » nang x, lang xa, mang xa
cau luu » cau luc
nang ma » tang ma, sang ma, nang cao
vi cua » vai cua, di cua
sac ky » cac ky, sai ky
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: tu ((sac ky) or (sach y)) ((nang xa) or (nang ma)) hoi. hieu vien cau luu van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) ((nang xa) OR (nang ma)) hoi. hieu vien cau luu van hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) ((nang xa) or (nang ma)) hoi. hieu vien cau luu van hanh vi cua te*.