Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
toc cach » toc sach, truoc cach, cuoc cach
hoc cach » hoc cac, hoc sach, cuoc cach
cong hoa » dong hoa, dong hoc, hang hoa
hoa lang » hoa dan, hoa van
lang hoa » hang hoa, lang ha, nang hoa
nhan van » nhan dan, nhan va, phan van
va nhan » van nhan, ca nhan, va phan
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: ((toc cach) or (hoc cach)) tuc tap, nghien thu cong hoa lang hoa hoc xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc cach) OR (hoc cach)) tuc tap, nghien thu cong hoa lang hoa hoc xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: ((toc cach) or (hoc cach)) tuc tap, nghien thu cong hoa lang hoa hoc xa hoi va nhan van*.