Perhaps you should try some spelling variations:
nang han » nang phan, nang hang, nang hanh
su triet » su viet, su tien, ve triet
han hoi » phan hoi, dan hoi, van hoi
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
hanh ve » hanh va, hanh kem
ve cac » va cac, vien cac
va cau » van cau, va cac, va dau
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ve cac ky nang han hoi. hieu va cau luc van ((hanh ve) or (hanh vi)) ((su triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve cac ky nang han hoi. hieu va cau luc van ((hanh ve) OR (hanh vi)) ((su triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: ve cac ky nang han hoi. hieu va cau luc van ((hanh ve) or (hanh vi)) ((su triet) or (va thiet))*.