Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
hanh dao » lanh dao, thanh dat, thanh dam
dao cuu » dao huu, dao cau, dao chu
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
sach xu » sach xa, cach xu, mach xu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach xu)) ((nang xa) or (sang ma)) hoi. hieu va cham truc va hanh dao cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach xu)) ((nang xa) OR (sang ma)) hoi. hieu va cham truc va hanh dao cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach xu)) ((nang xa) or (sang ma)) hoi. hieu va cham truc va hanh dao cuu tre*.