Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
thien van » thi van
hoc sach » hoc sinh, hoc cac, hoc anh
van hang » van khang, van hoang, van thang
hang di » hang doi, hang vi, hang dien
luc van » luoc van, luu van, duc van
hau luc » hau loc, cau luc, nhan luc
van hau » van ha, van hai, van dau
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cuu tre » cua tre, cau tren, cau treo
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: ((thuoc sach) OR (hoc sach)) ky tang xa hoi. thien van hau luc van hang di ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky tang xa hoi. thien van hau luc van hang di ((cua te) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky tang xa hoi. thien van hau luc van hang di ((cua te) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky tang xa hoi. thien van hau luc van hang di ((cua te) or (cuu tre))*.