Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kham thuc » nham thuc, pham thuc, tham thuc
sach tai » sach bai, sach tham, sach dao
sach nay » sach hay, sach vay, sach nang
vat hanh » vat thanh, van hanh, va hanh
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
vu kham » vu khanh
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach tai) or (sach nay)) lang xa hoi. hieu vu kham thuc vat hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tai) OR (sach nay)) lang xa hoi. hieu vu kham thuc vat hanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: te ((sach tai) or (sach nay)) lang xa hoi. hieu vu kham thuc vat hanh va cua triet*.