Perhaps you should try some spelling variations:
thien van » thi van
quoc quan » qua quan, luc quan, hoc quan
manh hai » lanh hai, minh hai, thanh hai
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
van cam » van nam, van lam, van cau
sach ty » sach tu, sach thu, xach tay
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach y)) lang xa hoi. thien van cam ((quoc quan) or (duc van)) manh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach y)) lang xa hoi. thien van cam ((quoc quan) OR (duc van)) manh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach y)) lang xa hoi. thien van cam ((quoc quan) or (duc van)) manh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach y)) lang xa hoi. thien van cam ((quoc quan) or (duc van)) manh hai cua tre*.