Perhaps you should try some spelling variations:
kmay nang » ky nang, kha nang, may nong
van dinh » van minh, van dich, va dinh
may nang » may nong, ky nang, cam nang
va triet » va trien, ve triet, cua triet
tu sach » thu sach, su sach, te sach
dinh vu » dich vu, dinh ve, dinh cu
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
x hoi » xa hoi, o hoi, x ho
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: tu sach ((may nang) or (kmay nang)) x hoi. hieu va cac xuc van dinh vu ((va triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((may nang) OR (kmay nang)) x hoi. hieu va cac xuc van dinh vu ((va triet) OR (va thiet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((may nang) or (kmay nang)) x hoi. hieu va cac xuc van dinh vu ((va triet) or (va thiet))*.