Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
ky sang » ky nang, ky dang, ky tang
xa hanh » xa thanh, xa khanh, va hanh
thuc xa » thuc xay, tuc xa, thuc va
tu sac » tu cac, tu san, tu bac
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu sach)) ky sang ((ma hoi) or (xa hoi)). hieu van nam thuc xa hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky sang ((ma hoi) OR (xa hoi)). hieu van nam thuc xa hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky sang ((ma hoi) or (xa hoi)). hieu van nam thuc xa hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky sang ((ma hoi) or (xa hoi)). hieu van nam thuc xa hanh vai cua te*.