Perhaps you should try some spelling variations:
tranh thuc » trinh thuc, trang thuc, thanh thuy
can tranh » canh tranh, tan tran, van ranh
hanh khoa » hang khoa, anh khoa, hanh hoa
hoa thong » hoa trong, hoa khong, hoc thong
khoa hoa » khoa khoa, khoa hoc, khoa hoi
hoa thon » hoa trong, khoa than, hoa khong
sach tri » sach tai, sach tren, sach truc
cao khoa » lao khoa, bao khoa, cac khoa
te sach » toc sach
tu can » tu ban, tu cac, thu canh
tri te » tri tue, tri le, tri ve
te cao » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu can tranh thuc hanh khoa hoa thon ) or ( te sach tri te cao khoa hoa thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu can tranh thuc hanh khoa hoa thon ) OR ( te sach tri te cao khoa hoa thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu can tranh thuc hanh khoa hoa thon ) or ( te sach tri te cao khoa hoa thong ))*.