Perhaps you should try some spelling variations:
thien van » thi van
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » nhanh hai, hang hai, hanh tai
van bac » van ban, van bao, van hac
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
doc hai » hoc hai, duc hai, do hai
doc hoi » duoc hoi, hoc hoi, doi hoi
ly nang » ky nang, ly hang, ly vang
cho tre » cho thue, khoe tre
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly nang ((doc hoi) or (doc hai)). thien van bac xuc va ((hanh hai) OR (thanh hai)) cho tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((doc hoi) OR (doc hai)). thien van bac xuc va ((hanh hai) OR (thanh hai)) cho tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ((doc hoi) or (doc hai)). thien van bac xuc va ((hanh hai) OR (thanh hai)) cho tre*".