Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hanh vai » hanh vi, hanh tai, hanh van
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ma hoi. ((hieu quan) or (hieu qua)) dau xuc van ((hanh vai) or (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ma hoi. ((hieu quan) OR (hieu qua)) dau xuc van ((hanh vai) OR (hanh va)) cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ma hoi. ((hieu quan) or (hieu qua)) dau xuc van ((hanh vai) or (hanh va)) cua te*.