Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
cac truc » cau truc, cac tru, cac trung
qua cac » cua cac
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
so sanh » do sanh
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) y nang ma hoi. hieu qua cac truc van hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) y nang ma hoi. hieu qua cac truc van hanh ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y nang ma hoi. hieu qua cac truc van hanh ((vi cua) or (vai cua)) tre*.