Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
su triet » su viet
ve triet » va trien
tuan vai » tuan tai, trang vai, tuan khai
van tuan » van quan, van ban, anh tuan
sach ky » sac ky, sach y, sach ty
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su tien » su kien, su hien, tu tieng
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky tang ma hoi. hieu ve cam luc van tuan vai ((ve triet) or (((su triet) OR (su tien))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky tang ma hoi. hieu ve cam luc van tuan vai ((ve triet) OR (((su triet) OR (su tien)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky tang ma hoi. hieu ve cam luc van tuan vai ((ve triet) or (((su triet) OR (su tien))))".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky tang ma hoi. hieu ve cam luc van tuan vai ((ve triet) or (((su triet) OR (su tien))))*.