Perhaps you should try some spelling variations:
sach luan » sach luyen, san luan
thuc hien » hoc hien
sach han » sach tham, sach danh, sach nang
cua viet » ca viet, hoa viet, cua vat
va lang » va nang, hoa lang
nang ma » tang ma, sang ma, nang cao
lang va » lang van, hang va, lang ha
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach y) or (sac ky)) nang ma hoi. thuc hien ((sach luan) OR (sach han)) va lang va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach y) OR (sac ky)) nang ma hoi. thuc hien ((sach luan) OR (sach han)) va lang va cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach y) or (sac ky)) nang ma hoi. thuc hien ((sach luan) OR (sach han)) va lang va cua viet*".