Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
van cam » van nam, van lam, van cau
hanh di » hanh vi, hanh de, hang di
xa hanh » xa thanh, xa khanh, va hanh
so sanh » do sanh
nang ma » tang ma, sang ma, nang cao
cam tuc » cam xuc, cam tu, nam thuc
di cua » dai cua, doi cua, de cua
ma hoi » mai hoi, xa hoi, ma hoa
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: ((tu cach) or (((hoc sach) or (so sanh)))) ky nang ma hoi. hieu van cam tuc xa hanh di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((hoc sach) OR (so sanh)))) ky nang ma hoi. hieu van cam tuc xa hanh di cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (((hoc sach) or (so sanh)))) ky nang ma hoi. hieu van cam tuc xa hanh di cua tu*.