Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
nguoi tieu » nguoi thieu, nguoi viet, nguoi thu
hieu quat » hieu qua, hieu luat, hieu suat
quat canh » luat canh, xuat canh, thuat canh
cho nguoi » cua nguoi
tieng han » tieng anh
canh cho » danh cho, anh cho, canh cha
phau hoc » phap hoc, thai hoc, nha hoc
pha hoc » phap hoc, nha hoc, khoa hoc
pho hoc » phoi hoc, cho hoc, pho ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao trinh hieu quat canh cho nguoi tieu ((((pha hoc) OR (pho hoc))) or (phau hoc)) tieng han~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh hieu quat canh cho nguoi tieu ((((pha hoc) OR (pho hoc))) OR (phau hoc)) tieng han*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh hieu quat canh cho nguoi tieu ((((pha hoc) OR (pho hoc))) or (phau hoc)) tieng han*".