Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau theo » cau tao
kho tang » cao tang
tang hoi » tang ho, tang loi, tan hoi
hoi hoc » hoa hoc, khoa hoc, hoi chuc
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
sac kho » suc khoe, cac khoi, dac khoa
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac kho tang hoi hoc. hieu va cac xuc ((va hanh) or (ban thanh)) hai ((cau theo) OR (cau thi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac kho tang hoi hoc. hieu va cac xuc ((va hanh) OR (ban thanh)) hai ((cau theo) OR (cau thi)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac kho tang hoi hoc. hieu va cac xuc ((va hanh) or (ban thanh)) hai ((cau theo) OR (cau thi))".
• Adding a wildcard symbol may retrieve word variants: su sac kho tang hoi hoc. hieu va cac xuc ((va hanh) or (ban thanh)) hai ((cau theo) OR (cau thi))*.