Perhaps you should try some spelling variations:
chuan quoc » han quoc, phan quoc, chua nuoc
quan hang » quan hoang, quan lang, quan hanh
cua quoc » cua nuoc, cua thuoc
loai hoc » logic hoc, loai khoa, hoa hoc
ky danh » ky anh, ky dang
hang vi » hang va, hanh vi, hang di
hieu vu » hieu va, hieu ve, hieu su
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky danh ((loai hoc) OR (dai hoc)). hieu vu ((chuan quoc) OR (cua quoc)) quan hang vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky danh ((loai hoc) OR (dai hoc)). hieu vu ((chuan quoc) or (cua quoc)) quan hang vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky danh ((loai hoc) OR (dai hoc)). hieu vu ((chuan quoc) or (cua quoc)) quan hang vi cua te*.