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
xua van » xua va, qua van, cua van
hanh va » hang va, hanh vi
dau xua » dau cua, dao xuan, dau luan
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
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 cao hoi. ((hieu quan) or (hieu qua)) dau xua 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 cao hoi. ((hieu quan) OR (hieu qua)) dau xua van ((hanh vai) OR (hanh va)) cua te.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang cao hoi. ((hieu quan) or (hieu qua)) dau xua van ((hanh vai) or (hanh va)) cua te*.