Perhaps you should try some spelling variations:
ha triet » nha triet, va triet, hanh triet
hieu luc » hieu luat, hieu qua
nhan luc » nang luc
chat luc » chat xuc, chat lua, chat huu
hieu cao » chieu cao, hieu cac, hieu ca
sach ty » sach y, sach tu, sach thu
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
van anh » van thanh, tuan anh, van minh
anh lam » hanh lam, xanh lam, anh cam
bo sach » co sach, hoc sach
lam ha » nam ha, dam ha, lam chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ty hang xa hoi. ((hieu cao) or (hieu luc)) ((chat luc) or (nhan luc)) van anh lam ha triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ty hang xa hoi. ((hieu cao) OR (hieu luc)) ((chat luc) OR (nhan luc)) van anh lam ha triet.
• Adding a wildcard symbol may retrieve word variants: bo sach ty hang xa hoi. ((hieu cao) or (hieu luc)) ((chat luc) or (nhan luc)) van anh lam ha triet*.