Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cau tren » cu tren, dau tren, ca tren
thu sach » thuat sach, thuoc sach, thu hoach
lang cac » bang cac, hang cac, dang cac
cac khoi » cac thoi, cac khoan, cach thoi
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau treo
tu sach » su sach, te sach, tu cach
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam

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)) ky lang cac khoi. hieu ve cam duc va thanh tai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky lang cac khoi. hieu ve cam duc va thanh tai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky lang cac khoi. hieu ve cam duc va thanh tai ((cuu tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky lang cac khoi. hieu ve cam duc va thanh tai ((cuu tre) or (cau tren))*.