Perhaps you should try some spelling variations:
khan thong » khap thong, khau thong, nhan thong
sach tren » sach tien, sach tranh
tren phuc » trang phuc, thien phuc, trinh phuc
tren thuc » trien thuc, tron thuc, trinh thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach thoi » cac thoi, cach thuc, cach noi
phuc dac » phuc cac, thuoc dac, thuc dan
kho khan » khoa kham, khoa than
tu sach » thu sach, su sach, tu cach
dac kho » dac khoa, dac khao, dac cho
te sach » toc sach
thoi he » khoi he, thoi hien, thoai hy

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 tren phuc dac kho khan thong ) or ( te sach tren thuc cach thoi he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tren phuc dac kho khan thong ) OR ( te sach tren thuc cach thoi he thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tren phuc dac kho khan thong ) or ( te sach tren thuc cach thoi he thong ))*.