Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
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
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
tai hoi » tai khoi, dai hoi, tai hai
ly nang » ky nang, ly hang, ly vang
vi dau » vi dai, va dau, bi dau

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 dau 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 dau 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 dau tren*.