Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
su triet » su viet, su tien
hieu van » hieu va, thien van, lieu va
ve triet » va trien
lang ha » long ha
sach tu » sach thu, cach tu, sach ty
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
da nang » cam nang, kha nang, cao nang
nang va » nang van, hang va, nang ma
duc da » duc dai, duc dao, duc dam

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

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