Perhaps you should try some spelling variations:
sach tham » sach nha
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
sach van » sach han, sach va, bach van
hanh ki » hanh vi, hanh ky, hanh kien
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve cam » ve cham, ve cac, va cam
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach van) or (sach tham)) ((nang xa) or (lang xa)) hoi. hieu ve cam xuc van hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach van) OR (sach tham)) ((nang xa) OR (lang xa)) hoi. hieu ve cam xuc van hanh ki su triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach van) or (sach tham)) ((nang xa) or (lang xa)) hoi. hieu ve cam xuc van hanh ki su triet*.