Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
van chu » van chi, van phu, van cau
chu duc » thu duc, chua duoc, cuu duoc
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
lam su » lai su, lam so, lam vu

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 ((y nang) or (v nang)) hoa hoc. hieu van chu duc va thanh lam su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) hoa hoc. hieu van chu duc va thanh lam su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) hoa hoc. hieu van chu duc va thanh lam su triet*.