Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chau tho, cau tra, cau tren
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
cho tre » cho thue, khoe tre
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ve cam duc ban hanh lai ((((chau tre) OR (cho tre))) or (chay tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ve cam duc ban hanh lai ((((chau tre) OR (cho tre))) OR (chay tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang xa hoi. hieu ve cam duc ban hanh lai ((((chau tre) OR (cho tre))) or (chay tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu ve cam duc ban hanh lai ((((chau tre) OR (cho tre))) or (chay tren))*.