Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
va cam » va cham, va cac, va cao
cam lo » nam lo, cam ly, cam o
lo gia » ho gia, co gia, do gia
v nang » va nang, vu nang, van nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (v nang)) ma hoi. hieu va cam lo gia thanh tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) ma hoi. hieu va cam lo gia thanh tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) ma hoi. hieu va cam lo gia thanh tai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (v nang)) ma hoi. hieu va cam lo gia thanh tai ((cua tre) or (cua te))*.