Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
thien van » thi van
dang xay » dang van, van xay
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
van lam » van nam
duc van » duc tan, duc manh, duc phan
hang di » hang doi, hang vi, hang dien
su sach » so sach, vu sach
di cau » da cau, diem cau

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 thu ((nang xa) or (dang xay)) hoi. thien van lam ((duc van) or (duc va)) hang di cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((nang xa) OR (dang xay)) hoi. thien van lam ((duc van) OR (duc va)) hang di cau triet.
• Adding a wildcard symbol may retrieve word variants: su sach thu ((nang xa) or (dang xay)) hoi. thien van lam ((duc van) or (duc va)) hang di cau triet*.