Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » thuat sach, thuoc sach, thu hoach
hanh lam » thanh lap, hanh kem, hanh va
ban hanh » ban hang
xuc ban » duc ban, cuc ban, quoc ban
cho tre » cho thue, khoe tre
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cac xuc » cam xuc, cac nuoc, chat xuc

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) OR (thu sach)) tu nang xa hoi. hieu va cac xuc ban hanh lam ((cho tre) or (chay tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) tu nang xa hoi. hieu va cac xuc ban hanh lam ((cho tre) OR (chay tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) tu nang xa hoi. hieu va cac xuc ban hanh lam ((cho tre) or (chay tren))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) tu nang xa hoi. hieu va cac xuc ban hanh lam ((cho tre) or (chay tren))*.