Perhaps you should try some spelling variations:
nhan luc » nang luc
cua tre » cua te, cuu tre, cua triet
xanh di » vanh dai, xanh tai
danh di » danh du, danh dien, danh gia
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
nang ma » tang ma, sang ma, nang cao
lang ha » long ha
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang ma) or (lang ha)) hoi. hieu va nhan luc va ((danh di) OR (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (lang ha)) hoi. hieu va nhan luc va ((danh di) OR (xanh di)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) or (lang ha)) hoi. hieu va nhan luc va ((danh di) OR (xanh di)) cua tre*".