Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sach tham » sach nha
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
tang ma » mang may, tang van
van lam » van nam
lam xuc » cam xuc, lam duoc
va tinh » may tinh
nang ma » sang ma, nang cao, mang may
su sach » so sach, vu sach
vi su » va su, ve su, ki 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 tham ((nang ma) OR (tang ma)) hoi. hieu van lam xuc ((va tinh) or (ban thanh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tham ((nang ma) OR (tang ma)) hoi. hieu van lam xuc ((va tinh) OR (ban thanh)) vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tham ((nang ma) OR (tang ma)) hoi. hieu van lam xuc ((va tinh) or (ban thanh)) vi su triet".
• Adding a wildcard symbol may retrieve word variants: su sach tham ((nang ma) OR (tang ma)) hoi. hieu van lam xuc ((va tinh) or (ban thanh)) vi su triet*.