Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
danh tai » doanh tai, dinh tai, hanh tai
cham luc » cham soc, nhan luc, cham cuu
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, va hanh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
bai ky » ban ky, sai ky, bac ky
luc va » duc va, tuc va, loc va
ha hoi » hoa hoi, xa hoi, va hoi
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) OR (ha noi)). hieu va cham luc va danh 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) OR (ha noi)). hieu va cham luc va danh tai ((cua tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te bai ky lang ((ha hoi) OR (ha noi)). hieu va cham luc va danh tai ((cua tre) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te bai ky lang ((ha hoi) OR (ha noi)). hieu va cham luc va danh tai ((cua tre) or (cau tren))*.