Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
vien cac » vien bach, vien dai, vien da
sang tao » hang tai
tao hoc » thao hoc, cao hoc, bao hoc
sach ty » sach tu, sach thu, xach tay
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
cua cau » cua cac, cua chu, cua can
cua cay » cua cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ty) or (sach y)) sang tao hoc. hieu vien cac vuc van hanh dai ((cua cau) OR (cua cay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ty) OR (sach y)) sang tao hoc. hieu vien cac vuc van hanh dai ((cua cau) OR (cua cay))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) or (sach y)) sang tao hoc. hieu vien cac vuc van hanh dai ((cua cau) OR (cua cay))*".