Perhaps you should try some spelling variations:
nang dai » nang tai, lang dai, nang cai
hanh hai » thanh hai, nhanh hai, hang hai
nang dau » hang dau, xang dau, nang du
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
luc van » luoc van, luu van, duc van
hieu ve » hieu va, hieu van
sach ly » sach y, sach lo, sach ty
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly ((nang dai) or (nang dau)) hai. hieu ve cam luc van hanh hai ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly ((nang dai) OR (nang dau)) hai. hieu ve cam luc van hanh hai ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: su sach ly ((nang dai) or (nang dau)) hai. hieu ve cam luc van hanh hai ((cua tre) or (cua tu))*.