Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nganh dong » nganh cong, nhanh dong, nganh nong
soc nganh » hoc nganh, hoc nhanh, cac nganh
thu sach » tu sach, thuat sach, thu hoach
van gian » van giang, dan gian, van giao
dong hoc » dong co, dong luc
long soc » lon soc, luong suc, cong so
cuu long » cuu cong, cuu tong, cuu nang
gian dan » gian lang
hoi tai » hoc tai, hoi trac
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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)) hoi tai, nghien cuu long soc nganh dong hoc xa hai van gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) hoi tai, nghien cuu long soc nganh dong hoc xa hai van gian dan.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) hoi tai, nghien cuu long soc nganh dong hoc xa hai van gian dan*.