Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
duc van » duc va, duc manh, duc phan
va cam » va cham, va cac, va cao
lam su » lai su, lam so, lam vu

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 va cam ((duc van) or (duc tan)) hanh lam su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu va cam ((duc van) OR (duc tan)) hanh lam su triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang xa hoi. hieu va cam ((duc van) or (duc tan)) hanh lam su triet*.