Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
te sach » toc sach
lang xa » lang ha, dang xay, lang van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
cua tuc » cua duc, cua tu, cua thuoc
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ve cac » va cac
vi cua » vai cua, di 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 o lang xa hoi. hieu ((ve cac) or (vien cac)) truc va hanh vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. hieu ((ve cac) OR (vien cac)) truc va hanh vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. hieu ((ve cac) or (vien cac)) truc va hanh vi cua tuc*.