Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
luoc can » luc canh, hoc can, luoc dai
cua viet » ca viet, hoa viet, cua dieu
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai hoi. hieu ve cac ((duc tan) OR (luoc can)) hanh vi ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang mai hoi. hieu ve cac ((duc tan) or (luoc can)) hanh vi ((cua viet) OR (cua vat))~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai hoi. hieu ve cac ((duc tan) or (luoc can)) hanh vi ((cua viet) OR (cua vat))*.