Perhaps you should try some spelling variations:
chau tren » cau tren, chay tren, cu tren
viet chau » viet cham, viet cau, viet chu
cau trung » cau truong, cac trung, cao trung
sach ky » sac ky, sach y, sach kem
va phap » va phat, ban phap
va than » va thanh, van than, va phan
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
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 ty)) nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet chau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang xa hoi. hieu va cau trung ((va than) OR (va phap)) viet chau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet chau tren".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang xa hoi. hieu va cau trung ((va than) or (va phap)) viet chau tren*.