Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh tai » thanh tai, hang tai, han tai
tham luc » than luc, tham nuoc, tham thuc
lang ha » long ha
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
bai ky » ban ky, sai ky, bac ky
luc va » duc va, tuc va, loc va
te bai » te bao, te tai, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: te bai ky lang ha hoi. hieu va tham luc va hanh tai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te bai ky lang ha hoi. hieu va tham luc va hanh tai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te bai ky lang ha hoi. hieu va tham luc va hanh tai ((cua tre) or (cau tren))*.