Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
giup qua » giap qua, giau qua, gioi qua
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
qua ban » cua ban, qua quan
cua tre » cuu tre, cua triet, dua tren
sac ky » cac ky, sai ky
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: tu ((sach ky) or (sac ky)) nang x ho. hieu va giup qua ban thanh tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x ho. hieu va giup qua ban thanh tai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x ho. hieu va giup qua ban thanh tai ((cua tre) or (cua te))*.