Perhaps you should try some spelling variations:
tuan mach » luan mach, tran mach, thuat mach
mach khoa » bach khoa, anh khoa, may khoa
phu thong » pho thong, phap thong, khau thong
sach tren » sach tien, sach tranh
lanh khoa » anh khoa, xanh khoa, doanh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
cach tri » cach thoi, cac tro, cach noi
tri tuan » tri quan, tran tuan, tri tue
khoa phu » khoa phau, khoa thu, hoa phu
tren tai » tren thi, tren vai, tien tai
tai lanh » tai lang, thi lanh, tai anh
khoa hoc » hoa hoc
tu cach » tu cac
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach tri tuan mach khoa phu thong ) or ( te sach tren tai lanh khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach tri tuan mach khoa phu thong ) OR ( te sach tren tai lanh khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach tri tuan mach khoa phu thong ) or ( te sach tren tai lanh khoa hoc thong ))*.