Perhaps you should try some spelling variations:
canh thoi » cach thoi, hanh thoi, anh tho
thu canh » thuc hanh, thu cong, thu ban
thoi dai » hoc dai, hoi dap, hoi dan
dan khoa » dang khoa, da khoa, san khoa
hai quan » tac quan
nhan tai » hang tai, van tai, toan tai
cuu hoa » cuu khoa, cuu hoan, cau hoa
hai tan » hai van
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 canh thoi dai, nghien cuu hoa hoc dan khoa hoc xa ((hai tan) or (hai quan)) nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu canh thoi dai, nghien cuu hoa hoc dan khoa hoc xa ((hai tan) OR (hai quan)) nhan tai.
• Adding a wildcard symbol may retrieve word variants: thu canh thoi dai, nghien cuu hoa hoc dan khoa hoc xa ((hai tan) or (hai quan)) nhan tai*.