Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, xuc ban
mai hoi » mai khoi, dai hoi, lai hoi
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 ((y nang) or (v nang)) mai hoi. hieu ((ve cam) OR (va cam)) xuc van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) mai hoi. hieu ((ve cam) OR (va cam)) xuc van hanh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) mai hoi. hieu ((ve cam) OR (va cam)) xuc van hanh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) mai hoi. hieu ((ve cam) OR (va cam)) xuc van hanh vi cua tu*.