Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
van hanh » van thanh, ban hanh, van anh
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cac luc » cau luc, coc luc, cac nuoc
luc van » luoc van, luu van, duc van
te lai » te tai, te bai
lai ky » sai ky, dai ky
vi cua » vai cua, di cua
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: te lai ky ((nang xa) OR (nang ma)) hoi. hieu vien cac luc van hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te lai ky ((nang xa) OR (nang ma)) hoi. hieu vien cac luc van hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: te lai ky ((nang xa) OR (nang ma)) hoi. hieu vien cac luc van hanh vi cua te*.