Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
nhan luc » nang luc
lang van » dang van, tang van, hoang van
hanh di » hanh vi, hanh de, hang di
van hoi » van hoa, van hoc, van hoe
va hanh » van hanh, va thanh, va danh
di cua » dai cua, doi cua, de cua
luc va » duc va, tuc va, loc va
sach o » sach lo, sac o, mach o
cua te » cua tu

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: su ((sach o) OR (sach y)) lang van hoi. ((hieu quan) OR (hieu qua)) nhan luc va hanh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach o) OR (sach y)) lang van hoi. ((hieu quan) or (hieu qua)) nhan luc va hanh di cua te~".
• Adding a wildcard symbol may retrieve word variants: su ((sach o) OR (sach y)) lang van hoi. ((hieu quan) or (hieu qua)) nhan luc va hanh di cua te*.