Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh khoa » toan khoa
vung thanh » vuong thanh, vung nhanh, dung thanh
thanh phan » thanh pho, thanh san, thanh toan
soc doanh » so doanh, hoa doanh, voi doanh
thai vung » thai cong, thai van
thu sach » tu sach, thuat sach, thu hoach
cuu long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
khoa hoc » hoa hoc
xa thai » ca thai, a thai, da thai
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuoc sach)) hoc tap, nghien cuu long soc doanh khoa hoc xa thai vung thanh phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) hoc tap, nghien cuu long soc doanh khoa hoc xa thai vung thanh phan".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) hoc tap, nghien cuu long soc doanh khoa hoc xa thai vung thanh phan*.