Perhaps you should try some spelling variations:
tinh huong » dinh huong, tinh quang
thuc cach » thuoc sach, truoc cach, thuc hanh
phan hung » phan chung, phan ung, phan hong
cach hoa » cach hoan, cach hoc, bach hoa
hoa phan » hoa dan, co phan
hung mai » huong mai, hung dai, hung hai
mai minh » mai dinh, chi minh, van minh
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tinh huong) OR (anh huong)) chuyen đe ky thuat: kien thuc cach hoa phan hung mai minh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tinh huong) OR (anh huong)) chuyen đe ky thuat: kien thuc cach hoa phan hung mai minh*".