Perhaps you should try some spelling variations:
thi hang » thi hanh, thi nang, thi hong
hieu cac » hieu luc, hieu va, hieu van
cac nhat » cac nha, cac nhan, cac chat
danh dao » doanh dao, lanh dao, danh dau
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
nhat tu » nha tu, nhat vu, nhat ngu
va danh » va dinh, va dan, va hanh
dao su » dao suu, dan su, cao su

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 ((thuc hanh) or (thi hang)) cau hoi. hieu cac nhat tu va danh dao su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thuc hanh) OR (thi hang)) cau hoi. hieu cac nhat tu va danh dao su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ((thuc hanh) or (thi hang)) cau hoi. hieu cac nhat tu va danh dao su triet*.