Perhaps you should try some spelling variations:
tham lang » nham nang, pham hang, thai bang
toc sach » hoc sach, doc sach, thuoc sach
tay tang » tay lang, tay trung, tay quang
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
luu van » cuu van, luan van, luu hanh
cac luu » cac luat, sach luu
cho hoc » co hoc, khoa hoc
hieu ve » hieu va, hieu van
cua cay » cua cac
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de 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) OR (toc sach)) ((tay tang) or (tham lang)) cho hoc. hieu ve cac luu van hanh di cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ((tay tang) OR (tham lang)) cho hoc. hieu ve cac luu van hanh di cua cay*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ((tay tang) or (tham lang)) cho hoc. hieu ve cac luu van hanh di cua cay*".