Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
dang tinh » dang dinh, dang sinh, dang vinh
thuc dang » thuoc dang, thuc dan, thuc dung
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien
van nham » van nam, van nhan, van tham
ve triet » va trien
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach ty, sach kem
tinh vi » trinh vi, tinh voi, tinh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach y)) lang xa hoi. hieu van nham thuc dang tinh vi ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu van nham thuc dang tinh vi ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) lang xa hoi. hieu van nham thuc dang tinh vi ((su triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) lang xa hoi. hieu van nham thuc dang tinh vi ((su triet) or (ve triet))*.