Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
viec cam » viec lam, viec cua, vien cac
viec va » vien va, viec cua, viec lam
vai cua » hai cua, lai cua, bai cua
xuc van » duc van, luc van, xuc ban
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, ma hoa

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 ty nang ma hoi. hieu ((viec cam) or (viec va)) xuc van hanh ((vai cua) or (dai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. hieu ((viec cam) OR (viec va)) xuc van hanh ((vai cua) OR (dai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu ((viec cam) or (viec va)) xuc van hanh ((vai cua) or (dai cua)) triet*.