Perhaps you should try some spelling variations:
lang mai » lang hai, lang man, sang mai
hanh vai » hanh vi, hanh va, hanh tai
lang dai » lang hai, lang chai, hoang dai
luoc can » luc canh, hoc can, luoc dai
cuu tre » cua tre, cau tren, cau treo
vai cuu » vai cua
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((lang mai) OR (lang dai)) hoi. hieu ve cac ((duc van) or (luoc can)) hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((lang mai) OR (lang dai)) hoi. hieu ve cac ((duc van) OR (luoc can)) hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((lang mai) OR (lang dai)) hoi. hieu ve cac ((duc van) or (luoc can)) hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((lang mai) OR (lang dai)) hoi. hieu ve cac ((duc van) or (luoc can)) hanh vai cuu tre*.