Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
thai cua » than cua, tai cuc, dai cua
thuy san » thuat san, thuy anh
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
tu sac » tu sach, tu cac, tu san
nang o » nang co, nang ho, nang ro
o lai » o lao

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) or (thuy san)) ky nang o lai. hieu vien cac luc van hanh ((thai cua) or (tri cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thuy san)) ky nang o lai. hieu vien cac luc van hanh ((thai cua) OR (tri cua)) te.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thuy san)) ky nang o lai. hieu vien cac luc van hanh ((thai cua) or (tri cua)) te*.