Perhaps you should try some spelling variations:
nganh cong » nhanh chong
dan thuc » dan toc, am thuc
tan nhan » tran nhan, tao nhan, van nhan
nhan van » nhan dan, nhan va, phan van
hai tan » hai van, hai quan
tu dan » tuc dan, tu ban, cu dan
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: tu dan thuc vat, nghien cuu van hoa ((nganh cong) or (thanh cong)) hoc xa hai tan nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan thuc vat, nghien cuu van hoa ((nganh cong) OR (thanh cong)) hoc xa hai tan nhan van.
• Adding a wildcard symbol may retrieve word variants: tu dan thuc vat, nghien cuu van hoa ((nganh cong) or (thanh cong)) hoc xa hai tan nhan van*.