Perhaps you should try some spelling variations:
thai cuu » thai cua, tai cuc, thai xu
sach ky » sac ky, sach ty, sach kem
thi cuc » tai cuc
cau tuc » cau truc, cau tu, cau luc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
xa dan » ca dan, xa dai, va dan
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach y)) nang xa hoi. hieu va cau tuc xa dan ((thai cuu) or (thi cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang xa hoi. hieu va cau tuc xa dan ((thai cuu) OR (thi cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) nang xa hoi. hieu va cau tuc xa dan ((thai cuu) or (thi cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) nang xa hoi. hieu va cau tuc xa dan ((thai cuu) or (thi cuc)) tre*.