Perhaps you should try some spelling variations:
khoan phai » khong phai, khoan hoi, khoan nhoi
phai tuong » phan thuong, pham thuong, pham truong
tranh thuc » trinh thuc, trang thuc, thanh thuy
phau thong » phap thong, khau thong, phan thong
canh thuc » anh thuc, cach thuc, danh thuc
thuc thuc » hoc thuc
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa phau » hoa phan, khoa kham, khoa than
thu canh » thu cong, thu ban, thu hang
thuc cac » thuc cach, tuc cac, phuc cac
tu canh » tu chanh, tu can, tu hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu canh thuc thuc cac khoan phai tuong ) or ( tu canh tranh thuc hanh khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh thuc thuc cac khoan phai tuong ) OR ( tu canh tranh thuc hanh khoa phau thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu canh thuc thuc cac khoan phai tuong ) or ( tu canh tranh thuc hanh khoa phau thong ))*.