Perhaps you should try some spelling variations:
hoang xa » hoang ha, hoang va, hoang xuan
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
duoc va » nuoc va, duoc ma, duong va
vai cua » dai cua, hai cua, lai cua
va hoc » van hoc
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach y)) hoang xa hoi. hieu va hoc ((duoc va) or (duc va)) hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) hoang xa hoi. hieu va hoc ((duoc va) OR (duc va)) hanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach y)) hoang xa hoi. hieu va hoc ((duoc va) or (duc va)) hanh vai cua cu".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach y)) hoang xa hoi. hieu va hoc ((duoc va) or (duc va)) hanh vai cua cu*.