Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cam thuc » am thuc, nam thuc, cam thu
tay lang » tai lang, tay tang, tay quang
hieu van » hieu va, thien van, lieu va
su sach » so sach
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
van cam » van nam, van lam, van cau
vu sach » vu bach, vu khach
y lang » o lang, _ lang, yen lang
vai va » mai va, dai va, hai 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) OR (tay lang)) xa hoi. hieu van cam thuc va hanh vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ((y lang) OR (tay lang)) xa hoi. hieu van cam thuc va hanh vai va thiet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ((y lang) OR (tay lang)) xa hoi. hieu van cam thuc va hanh vai va thiet*".