Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
hanh lam » thanh lap, hanh kem, hanh va
phan lap » phan dau
hanh lai » hanh tai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
van hac » van hoc, van ha, van hai
hac duc » hoc duc, ha duc, thach duc
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa

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 ky nang ma hoi. hieu van hac duc va ((((hanh lai) OR (hanh lam))) or (phan lap)) chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoi. hieu van hac duc va ((((hanh lai) OR (hanh lam))) OR (phan lap)) chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoi. hieu van hac duc va ((((hanh lai) OR (hanh lam))) or (phan lap)) chau triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoi. hieu van hac duc va ((((hanh lai) OR (hanh lam))) or (phan lap)) chau triet*.