Perhaps you should try some spelling variations:
giai hanh » giai han, gia hanh, giao hanh
cau theo » cau thi, cau tao
cau tren » cu tren, dau tren, ca tren
van chat » cao chat
hieu van » hieu va, thien van, lieu va
thu lang » thu bang, phu lang, tho lang
thu hang » thi hang, thuc hanh, thu huong
hanh ve » hanh vi, hanh va, hanh kem
tu sach » thu sach, su sach, te sach

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 ((thu lang) or (thu hang)) xa hoi. hieu van chat va giai hanh ve ((cau tren) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu lang) OR (thu hang)) xa hoi. hieu van chat va giai hanh ve ((cau tren) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu lang) or (thu hang)) xa hoi. hieu van chat va giai hanh ve ((cau tren) or (cau theo))*.