Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
thuc dang » thuoc dang, thuc dan, thuc dung
nam thuc » nam thuoc, am thuc, nam thu
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
hieu ha » hieu hoa, hieu va, hieu ca
ha hoi » hoa hoi, ha noi, xa hoi

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 ((ky lang) or (ky tang)) ha hoi. hieu ha nam thuc dang hanh ((vai cua) OR (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky tang)) ha hoi. hieu ha nam thuc dang hanh ((vai cua) OR (hai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) or (ky tang)) ha hoi. hieu ha nam thuc dang hanh ((vai cua) OR (hai cua)) triet*".