Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tham soc » cham soc, tham nuoc, thai son
van tham » van thanh, van tuan, van chat
hieu van » hieu va, thien van, lieu va
nang dai » nang dau, nang tai, lang dai
dai hai » dai han, dai hoi, dai tai
vu sach » vu bach, su sach, vu khach
soc van » hoc van, oc van, sac van
te sach » toc sach
y nang » ky nang, ly nang, v nang
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu sach)) y nang dai hai. hieu van tham soc van hanh ((vi cua) OR (di cua)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (vu sach)) y nang dai hai. hieu van tham soc van hanh ((vi cua) OR (di cua)) viet~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu sach)) y nang dai hai. hieu van tham soc van hanh ((vi cua) OR (di cua)) viet*.