Perhaps you should try some spelling variations:
khap thong » phap thong, khau thong, khac thuong
sach tren » sach tien, sach tranh
tue hoach » ke hoach, quy hoach, thu hoach
hoach hoa » hoach ha, hoach hoi, hoach toan
dan thong » dan trong, ban thong, dan phong
cach thuc » anh thuc, cac thu
bach khoa » anh khoa
khoa khap » khoa kham, khoa khac, kho khan
toc sach » hoc sach, doc sach, thuoc sach
tren tue » tren que, tren thuc, tri tue
tu cach » tu cac
thuc te » thuc tien
te bach » te sach, thi bach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc sach tren tue hoach hoa dan thong ) or ( tu cach thuc te bach khoa khap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach tren tue hoach hoa dan thong ) OR ( tu cach thuc te bach khoa khap thong )).
• Adding a wildcard symbol may retrieve word variants: (( toc sach tren tue hoach hoa dan thong ) or ( tu cach thuc te bach khoa khap thong ))*.