Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
thong trinh » thong tinh, chuong trinh, cong trinh
quan truyen » qua truyen, gian truyen, quan tren
phan truyen » gian truyen, phan nguyen, phuc truyen
sach thanh » sach tranh, sach tham, danh thanh
cong hiv » chong hiv, among hiv, cong hieu
tu sach » thu sach, su sach, te sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thanh cong hiv ((thong trinh) or (phuong trinh)) ((quan truyen) OR (phan truyen)) thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thanh cong hiv ((thong trinh) OR (phuong trinh)) ((quan truyen) OR (phan truyen)) thong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thanh cong hiv ((thong trinh) or (phuong trinh)) ((quan truyen) OR (phan truyen)) thong".
• Adding a wildcard symbol may retrieve word variants: tu sach thanh cong hiv ((thong trinh) or (phuong trinh)) ((quan truyen) OR (phan truyen)) thong*.