Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach
vu sach » vu bach, vu khach
lang xa » lang ha, dang xay, lang van
van lam » van nam
y lang » o lang, _ lang, tay lang
tuc va » thuc va, truc va, duc va
vi va » vi van, vai va, vu va
thiet* » thieu*

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) or (vu sach)) y lang xa hoi. hieu van lam ((tuc va) OR (tuc xa)) hanh vi va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y lang xa hoi. hieu van lam ((tuc va) OR (tuc xa)) hanh vi va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) y lang xa hoi. hieu van lam ((tuc va) OR (tuc xa)) hanh vi va thiet*".