Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
luoc can » luc canh, hoc can, luoc dai
luoc van » luoc va, luot van, quoc van
cua tre » cua te, cuu tre, cua triet
luc van » luu van, duc van, luc va
hanh de » hanh ve, hanh kem
hieu ve » hieu va, hieu van
van hoe » van hoa, van hoc, van hieu
ky lang » ky nang, ky dang, ky tang
sai ky » sac ky
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu cua
te sai » te tai, te bai, te lai

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

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