Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
chat cua » nhat cua, chat va, chat huu
cham cuu » cap cuu
nang tai » hang tai, tang tai, sang tai
tu sach » su sach, te sach, tu cach
va hanh » van hanh, va thanh, va danh
tai hoi » tai khoi, dai hoi, tai hai
ly nang » ky nang, ly hang, ly vang
du tren » dua tren, dau tren, duc tren
vi du » vi dum, va du, ve du

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) OR (thu sach)) ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi du tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly nang tai hoi. lieu va ((cham cuu) OR (chat cua)) va hanh vi du tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi du tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly nang tai hoi. lieu va ((cham cuu) or (chat cua)) va hanh vi du tren*.