Perhaps you should try some spelling variations:
cham khoan » pham khoa, cac khoan, nham hoan
hoach hoi » hoc hoi, hoach ha, sach hoi
hoi phuc » hoi chuc, hoi phu, choi thuc
phuc cac » phuc cam, phuc ca, phuc cham
cac khoa » cac khoan, cac khoi, dac khoa
sach tai » sach bai, sach tham, sach dao
cuc cham » tuc cham, cuoc chay, phuc cham
khoan le » khoan ke, hon le, khoan va
le thong » le thuong, le hong, le trong
khoa he » hoa he, khoa hoc, khong he
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: (( thu hoach hoi phuc cac khoa he thong ) OR ( te sach tai cuc cham khoan le thong ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu hoach hoi phuc cac khoa he thong ) OR ( te sach tai cuc cham khoan le thong ))".
• Adding a wildcard symbol may retrieve word variants: (( thu hoach hoi phuc cac khoa he thong ) OR ( te sach tai cuc cham khoan le thong ))*.