Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hanh doi » thanh doi, hanh noi, hang doi
vu sach » vu bach, su sach
doi cua » dai cua, hoi cua
va lang » va nang, hoa lang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
ve cac » va cac, vien cac
va cam » va cham, va cac, va cao
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu khach)) va lang xa hoi. hieu ((ve cac) or (va cam)) truc va hanh doi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khach)) va lang xa hoi. hieu ((ve cac) OR (va cam)) truc va hanh doi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu khach)) va lang xa hoi. hieu ((ve cac) or (va cam)) truc va hanh doi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (vu khach)) va lang xa hoi. hieu ((ve cac) or (va cam)) truc va hanh doi cua tu*.