Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
hoc sac » hoc sach, hoc cac, hoc mac
hieu va » lieu va, hieu qua
danh va » doanh va, hanh va, anh va
sac ky » cac ky, sai ky
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sac ky nang x hoi. ((hieu va) or (hieu van)) cam ((xuc va) OR (tuc va)) danh va cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sac ky nang x hoi. ((hieu va) OR (hieu van)) cam ((xuc va) OR (tuc va)) danh va cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sac ky nang x hoi. ((hieu va) or (hieu van)) cam ((xuc va) OR (tuc va)) danh va cua cu".
• Adding a wildcard symbol may retrieve word variants: hoc sac ky nang x hoi. ((hieu va) or (hieu van)) cam ((xuc va) OR (tuc va)) danh va cua cu*.