Perhaps you should try some spelling variations:
thien van » thi van
hang dien » quang dien, dang dieu, nhan dien
cau triet » cau trieu, su triet, cua triet
dien cau » diem cau, dien cac, dien cu
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van lam » van nam
duc van » duc tan, duc manh, duc phan

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