Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
sach thu » sach thue, sach thieu, sach tham
hanh hai » thanh hai, nhanh hai, hang hai
hieu cao » chieu cao, hieu cac, hieu ca
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
sac ky » cac ky, sai ky

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 thu) or (sac ky)) nang xa hoi. hieu cao chat truc va hanh hai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sac ky)) nang xa hoi. hieu cao chat truc va hanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach thu) or (sac ky)) nang xa hoi. hieu cao chat truc va hanh hai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sac ky)) nang xa hoi. hieu cao chat truc va hanh hai ((cua tre) OR (cuu tre))*.