Perhaps you should try some spelling variations:
chu tinh » chau tinh, chua tinh, cuu tinh
tinh hoc » sinh hoc, tin hoc, hinh hoc
hoc phan » hoc dan, hoc pho
phan hoa » phan loai, phan phoi, phan hong
van tuan » van ban, anh tuan
van quan » van ban
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
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: chu tinh hoc tap, nghien cuu mot hoc phan hoa hoc xa thai ((van tuan) or (van quan)) san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chu tinh hoc tap, nghien cuu mot hoc phan hoa hoc xa thai ((van tuan) OR (van quan)) san.
• Adding a wildcard symbol may retrieve word variants: chu tinh hoc tap, nghien cuu mot hoc phan hoa hoc xa thai ((van tuan) or (van quan)) san*.